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Case Study Questions for Class 10 Science Chapter 7 Control and Coordination

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Question 1:

Read the case/passage and answer the questions given below.

To carry out a simple function such as eating food there has to be coordination of the eyes, hands and the mouth. The eyes have to focus on the food, the hands have to pick it up and take it to the mouth where it will be chewed. All these actions have to be coordinated in such a manner that they follow a particular sequence and the action is completed. A similar mechanism is also needed for internal functions of the body. This function is carried out by the nervous system. It is composed of (a) Specialised cells which can detect, receive and transmit different kinds of stimuli. These are called neurons. (b) Nerve fibres which are certain bundles of extended processes of nerve cells.

The individuals also have to adjust to the changing conditions around them and vary their responses. At the same time, the internal conditions of the body should be maintained constant. This is called homeostasis. The internal conditions of the body are maintained at a constant by controlling the physiology of the organisms.

(i) What will the correct sequence in which conduction of information through nerves take place? (ii) How homeostasis is said to maintain the equilibrium of the body? (iii) What function does the central nervous system perform? (iv) What happens when the dendrite tip of a nerve cell receives a signal?

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CBSE Class 10

CBSE Class 10 Science Chapter Wise Important Case Study Questions

Chapter wise important case study questions cbse class 10 science: cbse class 10 science board exam 2024 is just around the corner and students are working hard to score maximum marks. check these case study questions from class 10 science to ace your examination this year also download the solutions from the pdf attached towards the end. .

CBSE Class 10 Science Chapter Wise Important Case Study Questions: While the CBSE Board exam for Class 10 students are ongoing, the CBSE Class 10 Science board exam 2024 is to be held on March 2, 2024. With the exams just a few days away, CBSE Class 10th Board exam candidates are rushing to prepare the remaining syllabus, practising their weak portions, trying to revise the important questions from the past year papers, practise questions, etc.

Why are CBSE Class 10 Science Case Study Questions Important?

Section A : 20 Multiple Choice Questions (MCQs) carrying 1 mark each.
Section B : 6 Very Short Answer type questions carrying 2 marks each. Answers to these questions should be in the range of 30 to 50 words.
Section C : 7 Short Answer type questions carrying 3 marks each. Answers to these questions should be in the range of 50 to 80 words.
Section D : 3 Long Answer type questions carrying 5 marks each. Answers to these questions should be in the range of 80 to 120 words.
Section E : 3 Case Based/ Source Based units of assessment (4 marks each) with sub-parts.

How to solve case study questions in CBSE Class 10 Science?

Read the case given and the associated questions carefully.
Read the questions attentively and analyse what they are asking.
Apply your subject knowledge and theories in the given case to decide what the correct answers should be.

1.A chemical reaction is a representation of chemical change in terms of symbols and formulae of reactants and products. There are various types of chemical reactions like combination, decomposition, displacement, double displacement, oxidation and reduction reactions. Reactions in which heat is released along with the formation of products are called exothermic chemical reactions. All combustion reactions are exothermic reactions.

(i) The massive force that pushes the rocket forward through space is generated due to the

(a) combination reaction

(b) decomposition reaction

(d) double displacement reaction

(ii) A white salt on heating decomposes to give brown fumes and yellow residue is left behind. The yellow residue left is of

(a) lead nitrate

(b) nitrogen oxide

(d) oxygen gas

(iii) Which of the following reactions represents a combination reaction?

(a) CaO (s) + H2O (l) → Ca (OH)2 (aq)

(b) CaCO3 (s) → CaO (s) + CO2(g)

(d) 2FeSO4(s) → Fe2O3 (s) +SO2(g) + SO3(g)

(iv) Complete the following statements by choosing correct type of reaction for X and Y.

Statement 1: The heating of lead nitrate is an example of ‘X’ reaction.

Statement 2: The burning of magnesium is an example of ‘Y’ reaction.

(a)X-Combination,Y-Decomposition

(b)X-Decomposition,Y-Combination

(c)X-Combination,Y-Displacement

(d) X- Displacement, Y-Decomposition

2.The earlier concept of oxidation and reduction is based on the addition or removal of oxygen or hydrogen elements so, in terms of oxygen and hydrogen, oxidation is addition of oxygen to a substance and removal of hydrogen from a substance. On the other hand, reduction is addition of hydrogen to a substance and removal of oxygen from a substance. The substance which gives oxygen to another substance or removes hydrogen from another substance in an oxidation reaction is known as oxidising agent, while the substance which gives hydrogen to another substance or removes oxygen from another substance in a reduction reaction is known as reducing agent. For example,

(i) A redox reaction is one in which

(a) both the substances are reduced

(b) both the substances are oxidised

(d) one substance is oxidised while the other is reduced.

(ii) In the reaction, H2S+Cl2⟶S+2HCl

(a) H2S is the reducing agent.

(b) HCl is the oxidising agent.

(d) Cl2 is the reducing agent.

(iii) Which of the following processes does not involve either oxidation or reduction?

(a) Formation of slaked lime from quicklime.

(b) Heating mercuric oxide.

(d) Formation of zinc from zinc blende.

(iv) Mg+CuO⟶MgO+Cu

Which of the following is wrong relating to the above reaction?

(a) CuO gets reduced

(b) Mg gets oxidised.

(d) It is a redox reaction.

3.A copper vessel gets tarnished due to formation of an oxide layer on its surface. On rubbing lemon on the vessel, the surface is cleaned, and the vessel begins to shine again. This is due to the fact that which reacts with the acid present in lemon to form a salt which is washed away with water. As a result, the layer of copper oxide is removed from the surface of the vessel and the shining surface is exposed.

1.Which of the following acids is present in lemon?

(a) Formic acid

(b) Acetic acid

(d) Hydrochloric acid

2.The nature of copper oxide is

d) amphoteric

3.Name the salt formed in the above reaction

a) copper carbonate

b) copper chloride

c)copper citrate

d) copper citrate

4.The phenomenon of copper getting tarnished is

a) corrosion

b) rancidity

c) displacement

d)none of these

4.Metals as we know, are very useful in all fields, industries in particular. Non-metals are no less in any way. Oxygen present in air is essential for breathing as well as for combustion. Non-metals form a large number of compounds which are extremely useful, e.g., ammonia, nitric acid, sulphuric acid, etc. Non-metals are found to exist in three states of matter. Only solid non-metals are expected to be hard however, they have low density and are brittle. They usually have low melting and boiling points and are poor conductors of electricity.

i.____________ is a non-metal but is lustrous

A.Phosphorus

ii.Which of the following is known as 'King of chemicals'?

C. Sulphuric acid

D. Nitric acid

iii.Which of the following non-metals is a liquid?

iv.Hydrogen is used

A.for the synthesis of ammonia

B. for the synthesis of methyl alcohol

C.nitrogenous fertilizers

D. all of these

5.Nisha observed that the bottoms of cooking utensils were turning black in colour while the flame of her stove was yellow in colour. Her daughter suggested cleaning the air holes of the stove to get a clean, blue flame. She also told her mother that this would prevent the fuel from getting wasted.

a) Identify the reasons behind the sooty flame arising from the stove.

b) Can you distinguish between saturated and unsaturated compounds by burning them? Justify your answer.

c) Why do you think the colour of the flame turns blue once the air holes of the stove are cleaned?

6.Blood transport food, Oxygen and waste materials in our bodies. It consists of plasma as a fluid medium. A pumping organ [heart] is required to push the blood around the body. The blood flows through the chambers of the heart in a specific manner and direction. While flowing throughout the body, blood exerts a pressure against the wall or a vessel.

Pulmonary artery
Pulmonary vein
Very narrow and have high resistance
Much wide and have low resistance
Very narrow and have low resistance
Much wide and have high resistance
It is a hollow muscular organ
It is four chambered having three auricles and one ventricle.
It has different chambers to prevent O2 rich blood from mixing with the blood containing CO2
Both A & C
Blood = Plasma + RBC + WBC + Platelets
Plasma = Blood – RBC
Lymph = Plasma + RBC
Serum = Plasma + RBC + WBC

7.A brain is displayed at the Allen Institute for Brain Science. The human brain is a 3-pound (1.4-kilogram) mass of jelly-like fats and tissues—yet it's the most complex of all known living structures The human brain is more complex than any other known structure in the universe. Weighing in at three pounds, on average, this spongy mass of fat and protein is made up of two overarching types of cells—called glia and neurons— and it contains many billions of each. Neurons are notable for their branch-like projections called axons and dendrites, which gather and transmit electrochemical signals. Different types of glial cells provide physical protection to neurons and help keep them, and the brain, healthy. Together, this complex network of cells gives rise to every aspect of our shared humanity. We could not breathe, play, love, or remember without the brain.

1)Animals such as elephants, dolphins, and whales actually have larger brains, but humans have the most developed cerebrum. It's packed to capacity inside our skulls and is highly folded. Why our brain is highly folded?

b) Learning

3)Which among these protects our brain?

a)Neurotransmitter

b) Cerebrospinal fluid

d) Grey matter

4.Ram was studying in his room. Suddenly he smells something burning and sees smoke in the room. He rushes out of the room immediately. Was Ram’s action voluntary or involuntary? Why?

8.Preeti is very fond of gardening. She has different flowering plants in her garden. One day a few naughty children entered her garden and plucked many leaves of Bryophyllum plant and threw them here and there in the garden. After few days, Preeti observed that new Bryophyllum plants were coming out from the leaves which fell on the ground.

1.What does the incident sited in the paragraph indicate?

(a). Bryophyllum leaves have special buds that germinate to give rise to new plant.

(b). Bryophyllum can propagate vegetatively through leaves.

(c). Bryophyllum is a flowering plant that reproduces only asexually

(d). Both (a) and (b).

2.Which of the following plants can propagate vegetatively through leaves like Bryophyllum?

3.Do you think any other vegetative part of Bryophyllum can help in propagation? If yes, then which part?

4.Which of the following plant is artificially propagated (vegetatively) by stem cuttings in horticultural practices?

(b)Snakeplant

(d)Water hyacinth

9.The growing size of the human population is a cause of concern for all people. The rate of birth and death in a given population will determine its size. Reproduction is the process by which organisms increase their population. The process of sexual maturation for reproduction is gradual and takes place while general body growth is still going on. Some degree of sexual maturation does not necessarily mean that the mind or body is ready for sexual acts or for having and bringing up children. Various contraceptive devices are being used by human beings to control the size of the population.

1) What are common signs of sexual maturation in boys?

a) Broadening of shoulders

b) Development of mammary glands

c) Broadening of waist

d) High pitch of voice

2) Common sign of sexual maturation in girls is

a) Low pitch voice

b) Appearance of moustache and beard

c) Development of mammary glands

d) Broadening of shoulders

3) Which contraceptive method changes the hormonal balance of the body?

b) Diaphragms

c) Oral pills

d) Both a) and b)

4) What should be maintained for healthy society?

a) Rate of birth and death rate

b) Male and female sex ratio

c) Child sex ratio

d) None of these

10.Pea plants can have smooth seeds or wrinkled seeds. One of the phenotypes is completely dominant over the other. A farmer decides to pollinate one flower of a plant with smooth seeds using pollen from a plant with wrinkled seeds. The resulting pea pod has all smooth seeds.

i) Which of the following conclusions can be drawn?

(1) The allele for smooth seeds is dominated over that of wrinkled seeds.

(2) The plant with smooth seeds is heterozygous.

(3) The plant with wrinkled seeds is homozygous.

(b) 1 and 2 only

(d) 1, 2 and 3

ii) Which of the following crosses will give smooth and wrinkled seeds in same proportion?

(a) RR X rr

(b) Rr X rr

(d) rr X rr

iii) Which of the following cross can be used to determine the genotype of a plant with dominant phenotype?

(a) RR X RR

(b) Rr X Rr

(d) RR X rr

iv) On crossing of two heterozygous smooth seeded plants (Rr), a total of 1000 plants were obtained in F1 generation. What will be the respective number of smooth and wrinkled seeds obtained in F1 generation?

(a) 750, 250

(b) 500, 500

(d) 950, 50

11.Food chains are very important for the survival of most species.When only one element is removed from the food chain it can result in extinction of a species in some cases.The foundation of the food chain consists of primary producers.Primary producers or autotrophs,can use either solar energy or chemical energy to create complex organic compounds,whereas species at higher trophic levels cannot and so must consume producers or other life that itself consumes producers. Because the sun’s light is necessary for photosynthesis,most life could not exist if the sun disappeared.Even so,it has recently been discovered that there are some forms of life,chemotrophs,that appear to gain all their metabolic energy from chemosynthesis driven by hydrothermal vents,thus showing that some life may not require solar energy to thrive.

1.If 10,000 J solar energy falls on green plants in a terrestrial ecosystem,what percentage of solar energy will be converted into food energy?

(d)It will depend on the type of the terrestrial plant

2.Matter and energy are two fundamental inputs of an ecosystem. Movement of

(a)Energy is by directional and matter is repeatedly circulating

(b)Energy is repeatedly circulating and matter is unidirectional

(c)Energy is unidirectional and matter is repeatedly circulating

(d)Energy is multidirectional and matter is bidirectional

3.Raj is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying

(a)First trophic level

(b)Second trophic level

(c)Third trophic level

(d)Fourth trophic level

4.Which of the following, limits the number of trophic levels in a food chain

(a)Decrease in energy at higher trophic levels

(b)Less availability of food

(c)Polluted air

5.The decomposers are not included in the food chain. The correct reason for the same is because decomposers

(a) Act at every trophic level at the food chain

(b) Do not breakdown organic compounds

(d) Release enzymes outside their body to convert organic material to inorganic forms

12.Shyam participated in a group discussion in his inter school competition on the practical application of light and was very happy to win an award for his school. That very evening his father gave treat to celebrate Shyam’s win. Shyam while sitting saw an image of a person sitting at his backside in his curved plate and could see that person’s mobile drop in the flower bed. Person was not aware until Shyam went and informed him. He thanked Shyam for his clever move.

a)From which side of his plate Shyam observed the incident –

i)outward curved

ii)inward curved

iii)plane surface

b)Part of plate from which Shyam observed the incident acted like a-

i)concave mirror

ii)convex mirror

iii)plane mirror

c)The nature of the size of the image formed in above situation is –

i)real, inverted and magnified

ii)same size , laterally inverted

iii)virtual, erect and diminished

iv)real , inverted and diminished

d)Magnification of the image formed by convex mirror is –

more than 1

iii)equal to 1

iv)less than 1

The location of image formed by a convex lens when the object is placed at infinity is

(a) at focus

When the object is placed at the focus of concave lens, the image formed is

(a)real and smaller

(b) virtual and smaller

The size of image formed by a convex lens when the object is placed at the focus ofconvex lens is

(a) highly magnified

(b) point in size

When the object is placed at 2F in front of convex lens, the location of image is

(b) between F and optical center

(d) none of the above

14.One of the wires in domestic circuits supply, usually with a red insulation cover, is called live wire. with black insulation is called neutral wire. The earth wire, which has insulation of green colour, is usually connected to a metal plate deep in the earth near the house appliances that has a metallic body. Overloading contact, in such a situation the current in the circuit abruptly increases. circuit prevents damage to the appliances and the circuit due to overloading.

1 When do we say that an electrical appliance

2 Mention the function of earth wire in electrical line

3 How is an electric fuse connected in a domestic circuit?

4 When overloading and short circuiting are said to occur?

5 What is a live wire?

15.Light of all the colours travel at the same speed in vacuum for all wavelengths. But in any transparent medium(glass or water), the light of different colours travels at different speeds for different wavelengths, which means that the refractive index of a particular medium is different for different wavelengths. As there is a difference in their speeds, the light of different colours bend through different angles. The speed of violet colour is maximum and the speed of red colour is minimum in glass so, the red light deviates least and violet colour deviates most. Hence, higher the wavelength of a colour of light, smaller the refractive index and less is the bending of light.

(i)Which of the following statements is correct regarding the propagation of Light of different colours of white light in air?

(a) Red light moves fastest.

(b) Blue light moves faster than green light.

(d) Yellow light moves with the mean speed as that of the red and the violet light.

(ii)Which of the following is the correct order of wavelength?

(a) Red> Green> Yellow

(b) Red> Violet> Green

(d) Red> Yellow> Orange

(iii)Which of the following is the correct order of speed of light in glass?

(a) Red> Green> Blue

(b) Blue> Green> Red

(d) Green> Red> Blue

(iv)Which colour has maximum frequency?

16.The region around a magnet where magnetism acts is represented by the magnetic field.The force of magnetism is due to moving charge or some magnetic material. Like stationary charges produce an electric field proportional to the magnitude of charge, moving charges produce magnetic fields proportional to the current. In other words, a current carrying conductor produces a magnetic field around it. The subatomic particles in the conductor, like the electrons moving in atomic orbitals, are responsible for the production of magnetic fields. The magnetic field lines around a straight conductor (straight wire) carrying current are concentric circles whose centres lie on the wire.

1)The magnetic field associated with a current carrying straight conductor is in anti- clockwise direction. If the conductor was held horizontally along east west direction,what is the direction of current through it?

2)Name and state the rule applied to determine the direction of magnetic field in a straight current carrying conductor.

3)Ramus performs an experiment to study the magnetic effect of current around a current carrying straight conductor with the help of a magnetic compass. He reports that

a)The degree of deflection of magnetic compass increases when the compass is moved away from the conductor.

b)The degree of deflection of the magnetic compass increases when the current through the conductor is increased.

Which of the above observations of the student appears to be wrong and why?

Case Study Questions Class 10 Science CBSE Chapter Wise PDF

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Case Study Questions Class...

Case Study Questions Class 10 Science

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Download the app to get CBSE Sample Papers 2023-24, NCERT Solutions (Revised), Most Important Questions, Previous Year Question Bank, Mock Tests, and Detailed Notes.

Download Case study questions for CBSE class 10 Science in PDF format from the myCBSEguide App . We have the new pattern case study-based questions for free download. Class 10 Science case study questions

This article will guide you through:

What are case study questions?

Sample Papers with Case Study questions
Class 10 Science Case Study question examples
How to get case-based questions for free?
How to attempt the case-based questions in Science?

Questions based on case studies are some real-life examples. The questions are asked based on a given paragraph i.e. Case Study. Usually, 4-5 questions are asked on the basis of the given passage. In most cases, these are either MCQs or assertion & reason type questions. Let’s take an example to understand. There is one paragraph on how nitrogen is generated in the atmosphere. On the basis of this paragraph, the board asks a few objective-type questions. In other words, it is very similar to the unseen passages given in language papers. But the real cases may be different. So, read this article till the end to understand it thoroughly.

What is CBE?

CBSE stands for competency-based education. The case study questions are part of this CBE. The purpose of CBE is to demonstrate the learning outcomes and attain proficiency in particular competencies.

Questions on Real-life Situations

As discussed the case study questions are based on real-life situations. Especially for grade 10 science, it is very essential to have the practical knowledge to solve such questions. Here on the myCBSEguide app, we have given many such case study paragraphs that are directly related to real-life implications of the knowledge.

Sample Papers with Case Study Questions

Class 10 Science Sample Papers with case study questions are available in the myCBSEguide App . There are 4 such questions (Q.No.17 to 20) in the CBSE model question paper. If you analyze the format, you will find that the MCQs are very easy to answer. So, we suggest you, read the given paragraph carefully and then start answering the questions. In some cases, you will find that the question is not asked directly from the passage but is based on the concept that is discussed there. That’s why it is very much important to understand the background of the case study paragraph.

CBSE Case Study Sample Papers

You can download CBSE case study sample papers from the myCBSEguide App or Student Dashboard. Here is the direct link to access it.

Case Study Question Bank

As we mentioned that case study questions are coming in your exams for the last few years. You can get them in all previous year question papers issued by CBSE for class 1o Science. Here is the direct link to get them too.

Class 10 Science Case Study Question Examples

As you have already gone through the four questions provided in the CBSE model question paper , we are proving you with other examples of the case-based questions in the CBSE class 10 Science. If you wish to get similar questions, you can download the myCBSEguide App and access the Sample question papers with case study-type questions.

Case-based Question -1

Read the following and answer any four questions: Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt bed of rack salt was formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.

Phosphoric acid
Carbonic acid
Hydrochloric acid
Sulphuric acid
Blue vitriol
Washing soda
Baking soda
Bleaching powder

Case-based Question -2

V 1 + V 2 + V 3
V 1 – V 2 +V 2
None of these
same at every point of the circuit
different at every point of the circuit
can not be determined
20 3 Ω 203Ω
15 2 Ω 152Ω

Case-based Question -3

pure strips
impure copper
refined copper
none of these
insoluble impurities
soluble impurities
impure metal
bottom of cathode
bottom of anode

How to Attempt the Case-Based Questions in Science?

Before answering this question, let’s read the text given in question number 17 of the CBSE Model Question Paper.

All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.

See, there are only two sentences and CBSE is asking you 5 questions based on these two sentences. Now let’s check the first questions given there.

Energy in the case of higher plants and animals is obtained by a) Breathing b) Tissue respiration c) Organ respiration d) Digestion of food

Now let us know if you can relate the question to the paragraph directly. The two sentences are about energy and how it is obtained. But neither the question nor the options have any similar text in the paragraph.

So the conclusion is, in most cases, you will not get direct answers from the passage. You will get only an idea about the concept. If you know it, you can answer it but reading the paragraph even 100 times is not going to help you.

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Case Study Class 10 Science Questions and Answers (Download PDF)

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Case Study Class 10 Science

If you are looking for the CBSE Case Study class 10 Science in PDF, then you are in the right place. CBSE 10th Class Case Study for the Science Subject is available here on this website. These Case studies can help the students to solve the different types of questions that are based on the case study or passage.

CBSE Board will be asking case study questions based on Science subjects in the upcoming board exams. Thus, it becomes an essential resource to study.

The Case Study Class 10 Science Questions cover a wide range of chapters from the subject. Students willing to score good marks in their board exams can use it to practice questions during the exam preparation. The questions are highly interactive and it allows students to use their thoughts and skills to solve the given Case study questions.

Download Class 10 Science Case Study Questions and Answers PDF (Passage Based)

Download links of class 10 Science Case Study questions and answers pdf is given on this website. Students can download them for free of cost because it is going to help them to practice a variety of questions from the exam perspective.

Case Study questions class 10 Science include all chapters wise questions. A few passages are given in the case study PDF of Science. Students can download them to read and solve the relevant questions that are given in the passage.

Students are advised to access Case Study questions class 10 Science CBSE chapter wise PDF and learn how to easily solve questions. For gaining the basic knowledge students can refer to the NCERT Class 10th Textbooks. After gaining the basic information students can easily solve the Case Study class 10 Science questions.

Case Study Questions Class 10 Science Chapter 1 Chemical Reactions & Equations

Case Study Questions Class 10 Science Chapter 2 Acids, Bases & Salts

Case Study Questions Class 10 Science Chapter 3 Metals & Non-metals

Case Study Questions Class 10 Science Chapter 4 Carbon & Its Compounds

Case Study Questions Class 10 Science Chapter 5 Periodic Classification of Elements

Case Study Questions Class 10 Science Chapter 6 Life Processes

Case Study Questions Class 10 Science Chapter 8 How Do Organisms Reproduce

Case Study Questions Class 10 Science Chapter 9 Heredity & Evolution

Case Study Questions Class 10 Science Chapter 10 Light-Reflection & Refraction

Case Study Questions Class 10 Science Chapter 11 The Human Eye & the Colourful World

Case Study Questions Class 10 Science Chapter 12 Electricity

Case Study Questions Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Case Study Questions Class 10 Science Chapter 15 Our Environment

How to Solve Case Study Based Questions Class 10 Science?

In order to solve the Case Study Based Questions Class 10 Science students are needed to observe or analyse the given information or data. Students willing to solve Case Study Based Questions are required to read the passage carefully and then solve them.

While solving the class 10 Science Case Study questions, the ideal way is to highlight the key information or given data. Because, later it will ease them to write the final answers.

Case Study class 10 Science consists of 4 to 5 questions that should be answered in MCQ manner. While answering the MCQs of Case Study, students are required to read the paragraph as they can get some clue in between related to the topics discussed.

Also, before solving the Case study type questions it is ideal to use the CBSE Syllabus to brush up the previous learnings.

Features Of Class 10 Science Case Study Questions And Answers Pdf

Students referring to the Class 10 Science Case Study Questions And Answers Pdf from Selfstudys will find these features:-

Accurate answers of all the Case-based questions given in the PDF.
Case Study class 10 Science solutions are prepared by subject experts referring to the CBSE Syllabus of class 10.
Free to download in Portable Document Format (PDF) so that students can study without having access to the internet.

Benefits of Using CBSE Class 10 Science Case Study Questions and Answers

Since, CBSE Class 10 Science Case Study Questions and Answers are prepared by our Science experts referring to the CBSE Class 10 Science Syllabus , it provided benefits in various way:-

Case study class 10 Science helps in exam preparation since, CBSE Class 10 Question Papers contain case-based questions.
It allows students to utilise their learning to solve real life problems.
Solving case study questions class 10 Science helps students in developing their observation skills.
Those students who solve Case Study Class 10 Science on a regular basis become extremely good at answering normal formula based Science questions.
By using class 10 Science Case Study questions and answers pdf, students focus more on Selfstudys instead of wasting their valuable time.
With the help of given solutions students learn to solve all Case Study questions class 10 Science CBSE chapter wise pdf regardless of its difficulty level.

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Class 10 Science Case Study Questions PDF Download

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Are you searching for a comprehensive resource to improve your understanding and problem-solving skills in Class 10 Science? Look no further! In this article, we will explore the world of Class 10 Science case study questions and provide you with an opportunity to download a PDF resource containing a collection of case study questions designed specifically for this subject. Let’s dive in and enhance your knowledge!

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CBSE Class 10th – SCIENCE: Chapterwise Case Study Question & Solution

Case study questions provide a practical and real-life context for applying scientific concepts and principles. These questions require you to analyze a given scenario, identify relevant information, and utilize your scientific knowledge to solve problems or draw conclusions. Case study questions assess your ability to think critically, make connections, and apply scientific principles in a practical setting.

Chapterwise Case Study Questions for Class 10 Science

To support your preparation for Class 10 Science examinations, we have created a comprehensive PDF resource containing a collection of case study questions designed specifically for this subject. This PDF includes a variety of case studies covering different topics in Physics, Chemistry, and Biology. It will provide you with ample practice opportunities to enhance your analytical and problem-solving skills.

Case Study Questions for Chapter 1 Chemical Reactions and Equations
Case Study Questions for Chapter 2 Acids, Bases, and Salts
Case Study Questions for Chapter 3 Metals and Non-Metals
Case Study Questions for Chapter 4 Carbon and Its Compounds
Case Study Questions for Chapter 5 Periodic Classification of elements
Case Study Questions for Chapter 6 Life Processes
Case Study Questions for Chapter 7 Control and Coordination
Case Study Questions for Chapter 8 How do organisms reproduce?
Case Study Questions for Chapter 9 Heredity and Evolution
Case Study Questions for Chapter 10 Light reflection and refraction
Case Study Questions for Chapter 11 Human eye and colorful world
Case Study Questions for Chapter 12 Electricity
Case Study Questions for Chapter 13 Magnetic effects of current
Case Study Questions for Chapter 15 Our Environment

The above Case studies for Class 10 Science will help you to boost your scores as Case Study questions have been coming in your examinations. These CBSE Class 10 Science Case Studies have been developed by experienced teachers of schools.studyrate.in for the benefit of Class 10 students.

Class 10th Maths Case Study Questions

Benefits of Case Study Questions

Engaging with case study questions in Class 10 Science offers several benefits. Let’s explore some of them:

Real-life application: Case study questions allow you to apply scientific concepts to real-life situations, enhancing your understanding of their practical relevance.
Critical thinking skills: Analyzing case studies promotes critical thinking by challenging you to evaluate information, identify patterns, and draw logical conclusions.
Problem-solving abilities: Case study questions require you to identify problems, propose solutions, and make informed decisions based on scientific evidence.
Holistic learning: By examining different aspects of a case, you gain a broader perspective on scientific concepts and their interconnections.
Preparation for higher education: Case study questions prepare you for future academic pursuits by developing skills necessary for scientific research and analysis.

Understanding the Structure of Case Study Questions

Case study questions typically present a scenario or a problem related to a scientific concept. The questions may require you to analyze data, interpret graphs, or propose solutions based on the given information. It is important to read the case study carefully, identify key details, and understand the context before attempting to answer the questions.

Tips for Analyzing and Answering Case Study Questions

To effectively analyze and answer case study questions, consider the following tips:

Read the case study thoroughly: Take your time to understand the scenario, paying attention to key details and any scientific concepts mentioned.
Identify the problem or objective: Determine the main question or objective that the case study aims to address. This will guide your analysis and help you stay focused.
Break down the questions: Carefully read each question and break it down into smaller parts. Identify the specific information or data required to answer each question accurately.
Apply scientific knowledge: Utilize your understanding of scientific principles and concepts to analyze the case study. Make connections between the given information and relevant scientific theories.
Support your answers: Whenever possible, support your answers with scientific evidence or reasoning. Refer to specific data, graphs, or concepts from the case study to justify your conclusions.

Subject-wise Approach to Case Study Questions

Let’s explore how to approach case study questions in the subjects of Physics, Chemistry, and Biology.

In Physics case study questions, focus on understanding the principles and laws governing the given scenario. Analyze the data provided and apply relevant formulas and concepts to solve the problem. Consider factors such as motion, forces, energy, and electrical circuits, depending on the context of the case study.

Chemistry case study questions often involve analyzing chemical reactions, properties of substances, or experimental data. Pay attention to the details of the case study, such as reactants, products, conditions, and observations. Apply your knowledge of chemical reactions, bonding, and periodic trends to interpret and solve the problem.

Biology case study questions revolve around biological processes, organisms, and ecological relationships. Analyze the provided information, such as species interactions, environmental factors, or experimental results. Apply your understanding of biological concepts, such as genetics, evolution, ecosystems, and cellular processes, to address the questions effectively.

Importance of Practicing Case Study Questions

Practicing case study questions in Class 10 Science is crucial for several reasons:

Application of knowledge: Case study questions enable you to apply scientific knowledge to real-life situations, enhancing your understanding and practical skills.
Analytical thinking: Regular practice of case study questions hones your analytical thinking skills by challenging you to analyze complex scenarios and make informed decisions.
Comprehensive understanding: Engaging with case studies offers a holistic understanding of scientific concepts, allowing you to grasp their practical implications and interconnections.
Exam preparation: Practicing case study questions familiarizes you with the question patterns and formats commonly seen in Class 10 Science examinations, boosting your confidence and performance.

Case study questions offer a valuable opportunity to apply scientific knowledge in practical contexts. By engaging with these questions, you can develop critical thinking, problem-solving, and analytical skills necessary for success in Class 10 Science. Remember to carefully analyze the case study, apply your scientific understanding, and justify your answers with relevant evidence. Regular practice of case study questions will greatly enhance your overall performance in examinations.

Where can I find Class 10 Science case study questions?

You can download a comprehensive PDF resource containing Class 10 Science case study questions from schools.studyrate.in This resource is specifically designed to provide you with ample practice material.

Why is practicing case study questions important for exam preparation?

Regular practice of case study questions enhances your ability to apply scientific knowledge in practical contexts, improving your analytical thinking and problem-solving abilities. This ultimately contributes to better performance in Class 10 Science examinations.

How should I approach Class 10 Science case study questions?

Read the case study carefully, identify the problem or objective, and analyze the given information. Apply your scientific knowledge to address the questions and support your answers with relevant evidence.

Extra questions of class 10 science chapter 7 control and coordination pdf download, extra questions of class 10 social science economics chapter 5 consumer rights pdf download, extra questions of class 10 science chapter 11 human eye and colourful world pdf download, leave a reply cancel reply.

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NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination

The Class 10 NCERT Solutions for Science Chapter 7 Control and Coordination includes all the intext and exercise questions. Class 10 Science Chapter 7 Control and Coordination NCERT questions and answers help students to clear their doubts and to obtain good marks in Class 10 board exam. All the solutions provided in this article are strictly based on the CBSE syllabus and curriculum.

Class 10 Science Chapter 7 NCERT Questions and Answers

Class 10 Science Chapter 7 Control and Coordination NCERT Questions and Answers are prepared by experts with a detailed explanation that will help students complete their assignments & homework. Having a good grasp over CBSE NCERT Solutions for Class 10 Science will further help the students in their preparation for board exams and other competitive exams such as NTSE, Olympiad, etc.

NCERT Solutions for Class 10 Science Chapter 7 Intext Questions

Intext Question (Page No. 119)

Question 1: What is the difference between a reflex action and walking?

Question 2: What happens at the synapse between two neurons?

Answer: A very small gap that occurs between the last portion of axon of one neuron and the dendrite of the other neuron is known as a synapse. It acts as a one-way valve to transmit impulses in one direction only.This one-directional transfer of impulses occurs as the chemicals are produced in only one side of the neuron i.e., the axon’s side. From axon, the impulses travel across the synapse to the dendrite of the other neuron.

Question 3: Which part of the brain maintains posture and equilibrium of the body?

Answer: Cerebellum which is a part of Hind brain is responsible for Controls the motor functioning hence it is the part reengaged in the maintenance of posture and equilibrium of the body.

Question 4: How do we detect the smell of an agarbatti (incense stick)?

Answer: The thinking part of our brain is the forebrain. It has separate areas that are specialized for hearing, smelling, sight, taste, touch, etc. The forebrain also has regions that collect information or impulses from the various receptors. When the smell of an incense stick reaches us, our forebrain detects it. Then, the forebrain interprets it by putting it together with the information received from other receptors and also with the information already stored in the brain.

Question 5: What is the role of the brain in reflex action?

Answer: Reflex actions are formed instantaneously in response to the stimulus that has no time to think. For instance the sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is known as reflex arc.

Reflex action are generated in spinal cord and the information also reaches brain. This helps the brain to record this event and remember it for future use. Brain helps the person the person to get awareness of the stimulus and prevent himself from that situation again.

Intext Question (Page No. 122)

Question 1: What are plant hormones?

Answer: Plant hormones or phytohormones are naturally-occurring organic substances. These are synthesized in one part of the plant body (in minute quantities) and are translocated to other parts when required. The five major types of phytohormones are auxins, gibberellins, cytokinins, abscisic acid and ethylene.

Gibberellins help in the growth of the stem.
Auxins help in the growth of the stem.
Cytokinins promote cell division.
Abscisic acid is one example of a hormone which inhibits growth.

Question 2: How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

Question 3: Give an example of a plant hormone that promotes growth.

Answer: Examples of plants growth hormones: Auxins and Gibberlins are the hormone responsible for the growth of plant. Auxins are responsible for the cell elongation in shoot and also regulates growth. Gibberlin is responsible for stem elongation and germination.

Question 4: How do auxins promote the growth of a tendril around a support?

Answer: Auxins are the plant hormones produces at the tip of a shoot and root. Auxins are present at the tip of tendrils. When tendrils are attached around any support their growth is slowed down as auxins are sensitive to touch. This make them move to the other side of the tip to get support this makes the other side grow faster than the side of tendril in contact with the support and the tendril bends towards the support.

Question 5: Design an experiment to demonstrate hydrotropism.

Answer: Take two small beakers and label them as A and B. Fill beaker A with water. Now make a cylindrical-shaped roll from a filter paper and keep it as a bridge between beaker A and beaker B, as shown in the figure. Attach few germinating seeds in the middle of the filter paper bridge. Now, cover the entire set-up with a transparent plastic container so that the moisture is retained.

Observation: The roots of the germinating seeds will grow towards beaker A. This experiment demonstrates the phenomenon of hydrotropism

NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination image 1

Intext Question (Page No. 125)

Question 1: How does chemical coordination take place in animals?

Answer: Chemical coordination takes place in animals with the help of hormones. Hormone is the chemical messenger that regulates the physiological processes in living organisms. It is secreted by glands. The regulation of physiological processes and control and coordination by hormones comes under the endocrine system. The nervous system along with the endocrine system in our body controls and coordinates the physiological processes.

Question 2: Why is the use of iodised salt advisable?

Answer: It is advised to use iodised salt because thyroid gland needs iodine to produce thyroxin hormone. Thyroxin hormone controls all the metabolic activities of our body like metabolism of carbohydrates, fats and protein etc. Due to the deficiency of thyroxin a disease called goitre is caused.

Question 3: How does our body respond when adrenaline is secreted into the blood?

Answer: Adrenalin is a hormone secreted by the adrenal glands in case of any danger or emergency or any kinds of stress. It is secreted directly into the blood and is transported to different parts of the body. When secreted in large amounts, it speeds up the heartbeat and hence supplies more oxygen to the muscles. The breathing rate also increases due to contractions of diaphragm and rib muscles. It also increases the blood pressure. All these responses enable the body to deal with any stress or emergency.

Question 4: Why are some patients of diabetes treated by giving injections of insulin?

Answer: Insulin hormone regulates blood sugar levels. If this is not secreted in proper amounts, the sugar level in the blood rises. This causes many harmful effects. To treat harmful effects of increased level of blood sugar, the diabetic patients are treated by giving injections of insulin.

NCERT Solutions for Class 10 Science Chapter 7 Exercise Questions

Question 1: Which of the following is a plant hormone? (a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin

Answer: (d) Cytokinin

Question 2: The gap between two neurons is called a (a) dendrite (b) synapse (c) axon (d) impulse

Answer: (b) synapse.

Question 3: The brain is responsible for (a) thinking (b) regulating the heart beat (c) balancing the body (d) all of the above

Answer: (d) all of the above

Question 4: What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

Answer: Receptors are specialised cells located in our sense organs like ear, nose, skin, tongue and eyes. The function of receptors is to detect information from the environment. For example, olfactory receptors detect smell. If receptors do not work properly, the information obtained from the environment will be delayed to reach the spinal cord or brain. In this situation, the response to the environmental stimulus will be delayed causing harm to the body. For example, if skin receptors are damaged, and one accidentally touches a hot object, then his/her hands might get burn as the damaged receptor cannot perceive the external stimuli of heat and pain.

Question 5: Draw the structure of a neuron and explain its function.

Answer: Neurons are the functional units of the nervous system. The three main parts of a neuron are axon, dendrite and cell body.

Functions of the three parts of a neuron:

Axon: It conducts messages away from the cell body.
Dendrite: It receives information from axon of another cell and conducts the messages towards the cell body.
Cell body: It contains nucleus, mitochondria, and other organelles. It is mainly concerned with the maintenance and growth.

NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination image 2

Question 6: How does phototropism occur in plants?

Answer: The movement of plant in response to light is called phototropism. Stem shows positive phototropism as follows:

When growing plants detect light, a hormone called auxin, synthesized at the shoot tip, helps the cells to grow longer. When light is coming from one side of the plant, auxin diffuses towards the shady side of the shoot. This concentration of auxin stimulates the cells to grow longer on the side of the shoot which is away from light. Thus, the plant appears to bend towards light.

Question 7: Which signals will get disrupted in case of a spinal cord injury?

Answer: The reflex arc connections between the input and output nerves meet in a bundle in the spinal cord. In fact, nerves from all over the body meet in a bundle in the spinal cord on their way to the brain. In case of any injury to the spinal cord, the signals coming from the nerves as well as the signals coming to the receptors will be disrupted.

Question 8: How does chemical coordination occur in plants?

Answer: Plant growth, development and responses to the environment is controlled and coordinated by a special class of chemical substances known as hormones. Hormones are produced in one part of the plant and are transported to all the needy parts of the plant. The five major types of phytohormone are auxins, gibberellins, cytokinins, abscisic acid, and ethylene. These phytohormones are either growth promoters (such as auxins, gibberellins, cytokinins, and ethylene) or growth inhibitors such as abscisic acid.

Question 9: What is the need for a system of control and coordination in an organism?

Answer: The maintenance of the body functions in response to changes in the body by working together of various integrated body systems is known as coordination. All the movements that occur in response to stimuli are carefully coordinated and controlled. In animals, the control and coordination movements are provided by nervous and muscular systems. The nervous system sends messages to and away from the brain. The spinal cord plays an important role in the relay of messages. In the absence of this system of control and coordination, our body will not be able to function properly. For example, when we accidentally touch a hot utensil, we immediately withdraw our hand. In the absence of nerve transmission, we will not withdraw our hand and may get burnt.

Question 10: How are involuntary actions and reflex actions different from each other?

Question 11: Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.

Question 12: What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

Topics covered under Class 10 Science Chapter 7 Control and Coordination

Below we have listed the topics discussed in NCERT Solutions for Class 10 Science Chapter 7. The list gives you a quick look at the different topics and subtopics of this chapter.

NCERT Solutions for Class 10 Science Chapter 7 – A Brief Discussion

Chapter Overview: In keeping with the general principles of body organisation in multicellular organisms, specialised tissues are used to provide control and coordination activities. In animals, such control and coordination are provided by nervous and muscular tissues. But plants have neither a nervous system nor muscles. So in plants, cells change their shape for the conduction of information. Hormones also play an important role in coordination which has been discussed in the chapter briefly.

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The Science Subject case study for class 10th covers a wide range of chapters from the Science. Students willing to score good marks in their board exams can use it. The questions are highly interactive and it allows students to use their thoughts and skills to solve such kinds of questions.

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Case Study Questions for Chapter 1 Chemical Reactions and Equations
Case Study Questions for Chapter 2 Acids, Bases, and Salts
Case Study Questions for Chapter 3 Metals and Non-Metals
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NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination

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Important Questions for CBSE Class 10 Science Chapter 7 - Control and Coordination 2024-25

CBSE Class 10 Science Chapter-7 Important Questions with Answers - Free PDF Download

The important questions for Class 10 Science Chapter 7 control and coordination will help the students to prepare for their examination in an ordered way. These control and coordination Class 10 important questions are written in a simple and easy-to-understand way by the subject matter experts at Vedantu. To enable the students to get a fair idea of the chapter, students can rely on Chapter 7 Science Class 10 important questions . Students can use these for their exam preparation as important questions are made according to the priority of topics in the examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths and Science Students who are looking for better solutions can download Class 10 Maths NCERT Solutions and Class 10 Science NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

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Study Important Questions for Class 10 Science Chapter 7 - Control and Coordination

Very Short Answer Questions (1 Mark)

1. Junctions of two neurons are called.

Synapsis

Ans: a) Synapse

2. Which of the following is a plant hormone?

Ans: d) Cytokinin

3. When a person is suffering from severe cold, he or she cannot –

Differentiate the taste of an apple from that of an ice – cream.

Differentiate red light from the green light.

Differentiate a hot object from a cold object.

Differentiate the smell of perfume from that of an agarbatti

Ans: (d) Differentiate the smell of perfume from that of an agarbatti.

4. What do you mean by geotropism?

Ans: The growth of a plant due to Gravitational force is called geotropism. Growth in the direction of the force (downward) is known as positive geotropism and the growth in the direction opposite to the force (upward) is known as negative geotropism.

5. Name the two sets of nerves that constitute the peripheral nervous system.

Ans: The two sets of nerves that constitute the peripheral nervous system are

Sympathetic nervous system

Parasympathetic nervous system.

6. The brain is lodged inside the cavity of the skull known as:

Ans: c) Cranium

7. The electrical impulse travels in a neuron from –

Dendrite $\to $ Axon $\to $ Axonal end $\to $ Cell body

Cell body $\to $ Dendrite $\to $ Axon $\to $ Axonal end

Dendrite $\to $ Cell body $\to $ Axon $\to $ Axonal end

Axonal end $\to $ Axon $\to $ Cell body $\to $ Dendrite

Ans: Dendrite $\to $ Cell body $\to $ Axon $\to $ Axonal end

8. Which hormone brings about the development of the mammary gland?

Progesterone

Ans: Estrogen

9. Name the hormone which promotes plant growth.

Ans: The hormone which promotes plant growth is auxin.

10. Which part of the brain maintains the posture and equilibrium of the body?

Ans: The part of the brain which maintains the posture and equilibrium of the body is the cerebellum.

11. Which one of the endocrine glands is known as the master gland?

Parathyroid

Ans: a) Pituitary

12. The growth of tendrils in pea plants is due to

effect of light

effect of gravity

rapid cell division in tendrillar cells in contact with the support

rapid cell divisions in tendrillar cells that are away from the support

Ans: d) rapid cell divisions in tendrillar cells that are away from the support

13. Dwarfism results by –

Excess secretion of thyroxin

Less secretion of growth hormone

less secretion of adrenaline

Excess secretion of growth hormone.

Ans: b) Less secretion of growth hormone.

14. Write the function of the hormone “thyroxine” produced in our body.

Ans: Thyroxine produced in our body controls the overall metabolic rate of the body, it plays a vital role in digestion, muscle function, brain development, heart, and maintenance of bones.

15. Name the hormones secreted by the pancreas.

Ans: The hormones secreted by the pancreas are:

16. The neurons that carry nerve impulses from the spinal cord to effectors are called –

Sensory neurons

motor neurons

Interneurons

spinal neurons

Ans: Motor neurons.

17. Select the mismatched pair

Adrenaline – Pituitary gland

Testosterone – Testes

Estrogen – Ovary

Thyroxine – Thyroid gland.

Ans: Adrenaline – Pituitary gland.

18. Which one of the following is a nastic movement in plants?

Bending of plants towards light

Growing of roots towards gravity.

Dropping of touch – me – not leaflets on touch

Movement of pollen tubes towards chemicals.

Ans: Dropping of touch – me – not leaflets on touch

19. What is the function of the occipital lobe?

Ans: The function of the occipital lobe is visual perception. It includes:

Depth perception

Color determination

Object recognition

Movement, etc.

20. Which part of the brain links the endocrine system with the nervous system?

Ans: Hypothalamus is the part of the brain which links the endocrine system with the nervous system.

21. The visceral nervous system controls and integrates the function of –

Urinary bladder

Blood vessels

All of the above

Ans: d) All of the above

22. Which of the following statements are true about the brain?

The main thinking part of the brain is the hindbrain.

Centers of hearing, smell, memory, sight, etc are located in the forebrain.

Salivation, vomiting, and blood pressure is controlled by the medulla in the hindbrain.

The cerebellum does not control the posture and balance of the body.

(i) and (ii)

(ii) and (iii)

(i), (ii) and (iii)

(iii) and (iv)

Ans: b) (ii) and (iii)

23. The substance that results in the fall of mature leave and fruits from plants is due to:

Gibberellins

Cytokinin

Ans: c) ABA

24. Name the structural and functional unit of the nervous system.

Ans: The structural and functional unit of the nervous system is the neuron (nerve cell).

25. Name one sex hormone.

Ans: An example of a sex hormone is testosterone.

26. Which part of the brain maintains the posture and equilibrium of the body?

Ans: The cerebellum is the part of the brain which maintains the posture and equilibrium of the body.

27. Give an example of a plant hormone that promotes growth.

Ans: A plant hormone that promotes the growth of cells is auxin.

28. Which of the following is a plant hormone?

Ans: (d) Cytokinins

29. The gap between two neurons is called a

Synapse

Impulse

Ans: (b) synapse

30. The brain is responsible for

Thinking

Regulating the heartbeat.

Balancing the body

All of the above.

Ans: (d) all of the above.

31. What name is given to the microscopic gap between two adjacent neurons?

Ans: The microscopic gap between two adjacent neurons is known as the synapse.

32. If we step on something sharp accidentally, we move our foot away at once. What is this type of response known as?

Ans: This type of response is known as a reflex action.

33. Apart from the hindbrain, activities like walking, skating, riding a bicycle, and picking up a pencil are possible. Name this part of the hindbrain.

34. Name the plant hormone:

a. Which inhibits growth and causes wilting of leaves.

Ans: Abscisic acid inhibits growth and causes wilting of leaves.

b. Which promotes cell division.

Ans: Cytokinin promotes cell division.

35. Who transmits nerve impulses across the synapse?

Ans: Neurotransmitters are responsible for transmitting nerve impulses across the synapse.

36. Give the reason why endocrine glands release theft secretions into the blood?

Ans: Endocrine glands are ductless glands and hence instead of pouring their hormones into ducts , they release theft secretions into the blood.

Short Answer Questions (2 Marks)

1. How are involuntary actions and reflex actions different from each other?

Ans: Difference between reflex action and involuntary action is given below:

2. Why is the use of iodised salt advisable?

Ans: Iodine is a trace element and a necessary substrate for thyroid gland hormone synthesis. It is required by the thyroid gland to make thyroxine hormone. The use of iodised salt is advisable because it provides iodine needed by the thyroid gland to make sufficient thyroxine for our body that helps prevent risk of goitre.

3. Name the centre of the brain that controls

Ans: Medulla oblongata in hind brain controls swallowing.

Ans: Cerebrum in forebrain controls hearing.

4. Represent schematically the path of a reflex action.

Ans: The path of a reflex action is represented below:

Diagrammatic representation of path of a reflex action

5. Why are some patients of diabetes treated by giving injections of insulin?

Ans: Some patients of diabetes are treated by giving injections of insulin because insulin hormone regulates the levels of sugar in the blood. In diabetic patients, insulin hormone is not secreted by pancreas in the required amount and therefore blood sugar level rises.

6. Which signal will get disrupted in case of a spinal cord injury?

Ans: Spinal cord controls the reflex actions. And hence, the effects of spinal cord injury are:

Disturbed involuntary actions.

Disturbed reflex actions.

Inability of the quick response required to safeguard the body.

7. How does a touch – me – not plant respond to touching? What is this movement called?

Ans: Touch – me – no plant responds to touching by folding its leaflets and this type of movement is called growth independent movement i.e., the movement of plants that do not result in their growth.

8. What are phytohormones? Name them.

Ans: Phytohormones are synthesized at sites away from where they act. They diffuse to the area of action and help to co – ordinate growth, development and responses to the environment. Phytohormones are –

Gibberellins

Abscisic acid

9. What is the role of the brain in reflex action?

Ans: A reflex action is a rapid and spontaneous action in response to any stimulus. It is controlled by the spinal cord. Example- Sudden jerky withdrawal of hand after touching something hot. T he reflex action is instant where thinking is not involved and hence the brain has no role. Although the information also goes on to the brain where the encounter remains the memory and makes us aware of our actions.

10. How is control and coordination between the environment and plants brought about?

Ans: Plants responses are of two types

Growth dependent – They are due to cell divisions.

Growth independent response – They are due to change in the amount of water.

Plants do not perform control & coordination like animals but they give responses to external stimuli like touch, light, and chemicals, etc.

11. Give two examples of functions in plants that are regulated by light.

Ans: The two functions in plants that are regulated by light are:

Seed germination - Breaking of dormancy

Photosynthesis – Respiration process

12. What is coordination? Give an example.

Ans: Coordination is a process through which two or more organs interact and complement the functions of one to adjust the vital activities of life. For example – under stressed conditions, the adrenal gland secretes the adrenaline hormone which prepares the body to face the emergency by increasing the breathing rate and heartbeat so that more oxygen can be supplied to the body.

13. How do endocrine glands help in maintaining feedback control?

Ans: The timing and amount of hormones released are regulated by the feedback mechanism. The endocrine system depends on the feedback system concerning hormones. There are two types of feedback systems –

Negative Feedback – This mechanism prevents deviation from the ideal mean value. For ex- less glucose levels in the blood do not induce the pancreatic cells to produce insulin so that less conversion of glucose to glycogen may occur.

Positive Feedback – These mechanisms promote deviation from the mean ideal value. For ex- High glucose level in the blood induces. The pancreatic cells produce insulin which converts glucose to glycogen.

14. Which types of glands in the human body secrete hormones? State any one location for them.

Ans: Three types of glands that secrete hormones in the human body are-

Exocrine gland – These types of glands have ducts that do not secrete their secretion into the blood. For example – the salivary gland.

Endocrine gland – These types of glands do not have ducts, they pour their secretion into blood. For example – The pituitary gland.

15. What is the result of hypothyroidism in children called?

Ans: The result of hypothyroidism in children is known as exophthalmic goiter. The exophthalmic goiter results in bulging of eyes, increased blood pressure, and heartbeat.

16. How is flowering affected in plants by various hormones?

Ans: Flowering is affected in plants by various hormones such as auxins and cytokinin promotes female flowers while gibberellins promote male flowers. Duration of light affects flowering in long-day plants and short-day plants.

17. Name the fluid-filled between the meninges of the brain. What are its functions?

Ans: The fluid-filled between the meninges of the brain is known as the cerebrospinal fluid. Its function is to protect the brain from mechanical shocks.

18. Name any two heterocrine glands and mention their function.

Ans: The two heterocrine glands are:

Pancreas – Its endocrine function is to produce insulin and glucagon. Its exocrine function is to produce digestive enzymes.

Ovaries – Its endocrine function is to produce estrogen and progesterone hormone. Its exocrine function is to produce female gametes.

19. What is the response of the stem towards light & gravity?

Ans: Plants' growth response to gravity is known as gravitropism and to light is phototropism. The stem shows a positive response toward the light i.e., it grows in the direction of the light and it shows a negative response toward gravity i.e., it grows in the opposite direction of gravity.

20. Name two activities that are regulated by plant pigments.

Ans: The two activities that are regulated by plant pigments are:

The response to the photoperiodic stimulus – due to some specialized pigments and phytochromes.

The control and coordination in plants with their environment.

21. How do we detect the smell of an agarbatti (incense stick)?

Ans: Olfactory receptors help us detect the smell of an agarbatti. When you smell the scent of an incense stick, it first reaches your nose, where it is detected by the olfactory receptors. It is then sent to the forebrain in the form of electrical signals. The forebrain then interprets these electrical signals as the smell of an incense stick.

Pathway by which smell of incense stick is detected

22. What are plant hormones?

Ans: Hormones are the chemicals that help to coordinate growth, and development. Plant hormones are the chemicals that help to coordinate growth, development, flowering and response to the environment in plants. For example – auxins, gibberellins, abscisic acid (ABA), cytokinin, etc.

23. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

Ans: In the movement of leaves of sensitive plants, growth is not involved and movement is away from the source. Whereas, in the movement of shot towards light, growth is involved and movement is towards the source.

24. How does chemical coordination take place in animals?

Ans: The chemical coordination in animals is maintained by hormones which are secreted by endocrine glands.

25. Give one example of a plant part.

Which is positively hydrotropic as well as positively geotropic.

Ans: Roots are positively hydrotropic as well as positively geotropic.

Which is positively phototropic but negatively geotropic.

Ans: Stem is positively phototropic but negatively geotropic.

26. The neck of a person appears to be swollen.

Name the disease this person is suffering from.

Ans: The person is suffering from goitre.

Name the mineral whose deficiency in the diet causes this disease.

Ans: Deficiency of iodine in the diet causes this disease.

27. Taking the example of heart beat, justify the antagonistic action of the sympathetic and the parasympathetic nerves.

Ans: Antagonistic action of the sympathetic nerve – increases contraction and rhythm with respect to heart beat.

Antagonistic action of the parasympathetic nerve – decreases contraction and rhythm with respect to heart beat.

28. Why is abscisic acid known as stress hormone in plants?

Ans: Abscisic acid is known as a stress hormone in plants because unlike growth hormone, it inhibits growth and causes wilting of leaves.

29. Name the part of neuron

where information is acquired.

Ans: Dendrite is the part of the neuron where information is acquired.

through which information travels as an electrical impulse.

Ans: Axon is the part of the neuron through which information travels as an electrical impulse.

30. Why do leaves drop off seasonally?

Ans: The leaves drop off seasonally because of the cuts off supply of nutrients and water to leaves which happened due to stopped production of auxin.

31. A person suffered a head injury, due to which he faces breathing problems. No problem was detected with his respiratory system. What could be the cause of this problem?

Ans: A person suffered a head injury, faces breathing problems because he was injured in medulla oblongata. Medulla oblongata controls the respiratory system so he will be affected by breathing problems.

32. In a family of normal sized members, there are two exceptions, one member is dwarf and one is tall like “Khali”. What could be the cause of it?

Ans: Uneven heights in the family is caused due to malfunctioning of the growth hormone. In case of dwarfs, there is a deficiency of growth hormone whereas in case of giants there is an excess of growth hormone. Growth hormones are secreted from the pituitary gland.

33. Why do you blink your eyes as bright light is focused on you?

Ans: We blink our eyes as bright light is focused on us due to reflex action. It is done to protect the eye from bright light which otherwise would damage the retina. The amount of light that enters your eyes is controlled by the pupils. Hence, blinking the eyes cuts off the excessive light.

34. There is a polled plant in your drawing room, after a few days you notice that the plant has bent to one side. What could be the reason? How has this movement been coordinated?

Ans: The polled plant in your drawing room, after a few days bent to one side due to phototropic movement of the stem and it happens because of unequal growth of the stem on both sides which is initiated by the auxin hormone.

35. A leaf shaped gland is present above the intestine. The secretion of this gland regulates the metabolism of sugar in blood. Name the secretion and gland.

Ans: A leaf shaped gland that is present above the intestine and whose secretion regulates the metabolism of sugar in blood is the pancreas. The secretion is Insulin from special cells in it.

Short Answer Questions (3 Marks)

1. Mention three important functions of gibberellins.

Ans: Three important functions of Gibberellins are –

Stimulate stem elongation.

Help in breaking seed dormancy.

Promote production of male flowers.

2. What is the function of receptors in our body? What happens when receptors do not work properly?

Ans: The receptors detect information from the environment. If they do not work properly, the information will not be detected or will be detected late, due to which further process will be delayed and the signals will take time reaching the spinal cord or the brain. Hence, the response to the environmental stimulus will be delayed causing harm to the body.

3. What happens at the synapse between two neurons?

Ans: Junctions of two neurons is called synapses. When a receptor detects a stimulus, chemicals is set off through the neurons. These electric signals travel from the dendrite of the presynaptic neuron to its cell body and then along its axon. At the end of axon of this neuron, the electrical impulse crosses the synapse and starts a similar electrical impulse in the dendrite of the next neuron.

4. What is the need for a system of control and coordination in an organism?

Ans: The control and coordination in an organism is needed for the proper functioning of the body. It handles appropriate movement in response to any external stimulus.

Multicellular organisms have a complex body and hence it coordinates with various organs of the body of an organism working together in a proper manner to produce proper reaction to stimulus. For example – under stressed conditions, the adrenal gland secretes the adrenaline hormone which prepares the body to face the emergency by increasing the breathing rate and heartbeat so that more oxygen can be supplied to the body.

5. Pituitary is a master endocrine gland. Justify this statement.

Ans: Pituitary gland is a master gland because it regulates the secretion of other endocrine glands such as -

Growth hormones

Thyroid stimulating hormone

Adrenocorticotropic hormone

Follicle stimulating hormone

Luteinizing hormone

Prolactin

Pituitary gland is located at the base of the brain and is attached to the hypothalamus by nerve fibres and blood vessels. The pituitary gland consists of Anterior lobe and Posterior lobe.

6. Draw the structure of the neuron and explain its function.

Ans: The basic structure of a neuron has three components –

Junctions of two neurons is called synapses. When a receptor detects a stimulus, chemicals is set off through the neurons. These electric signals travel from the dendrite of the presynaptic neuron to its cell body and then along its axon. At the end of axon of this neuron, the electrical impulse crosses the synapse and starts a similar electrical impulse in the dendrite of the next neuron.

7. How does our body respond when adrenaline is secreted into the blood?

Ans: Adrenaline is a hormone which is involved in regulating visceral functions. Adrenaline is normally produced both by the adrenal glands and by a small number of neurons in the medulla oblongata. Under stressed conditions, the adrenal gland secretes the adrenaline hormone which prepares the body to face the emergency by increasing the breathing rate and heartbeat so that more oxygen can be supplied to the body. The blood supply decreases from the skin and digestive system and increases to skeletal muscles.

8. Where are Pons and medulla oblongata located? Write their functions.

Ans: Pons and medulla Oblongata are located in hindbrain.

Function of Pons – it acts as a bridge between the brain and spinal cord.

Function of Medulla oblongata – it controls activities like salivation, swallowing, vomiting, breathing, coughing, sneezing, heartbeat, sleep, consciousness and activities of the cerebrum.

9. List the function of testosterone and estrogen. Where are they secreted?

Ans: Testosterone is secreted in male bodies.

Function of testosterone – It is responsible for development of male sex organs and secondary sex characteristics like moustache, beard & voice.

Estrogen is secreted in male bodies.

Function of estrogen – it is responsible for development of female sex organs and secondary sex characteristics like mammary gland and uterine growth.

10. Define ‘nerve impulse’. Which structure in a neuron helps to conduct a nerve impulse?

Towards the cell body?

Ans: Nerve Impulse is a wave of the passing of information through neurons in the form of electrical and chemical signals. Dendrite helps to conduct a nerve impulse towards the cell body.

Away from the cell body?

Ans: Nerve Impulse is a wave of the passing of information through neurons in the form of electrical and chemical signals. Axon helps to conduct a nerve impulse away from the cell body.

11. Differentiate between axon and dendrites?

Ans: Difference between axon and dendrites is:

12. Mention the structure of the human brain.

Ans: The structure of human brain is outlined below,

13. What are tropic movements? Name the types of tropic movements in plants.

Ans: Tropic movement is the bending or movement of a part of a plant in response to the external stimulus. The types of tropic movements in plants are:

Phototropism – response to light.

Geotropism – response to gravity

Chemotropism - response to chemicals.

Hydrotropism – response to water.

14. Name the different lobes of cerebrum.

Ans: There are four lobes of cerebrum –

a) Frontal lobe – The part of the brain associated with reasoning.

b) Parietal lobe – The part of the brain associated with perception of general sensation s like pressure, touch and pain.

c) Occipital lobe – The part of the brain associated with visual perception.

d) Temporal lobe – The part of the brain associated with formation of memory and interpretation of sound and the language.

15. How do auxins promote the growth of tendril around a support?

Ans: Auxin present in the plants is a growth hormone. When the tip of a tendril touches a support, auxins in its tip move away from the support. Hence, the side of the tendril away from the support grows faster and becomes longer than the side which is in contact with the support and makes the tendril curve towards the support.

16. Write different between exocrine and endocrine glands.

Ans: Difference between endocrine and exocrine gland is given below:

17. What are the different kinds of neurons?

Ans: There are three different kinds of neurons –

Sensory neurons – their work is to convey impulses from receptors to the main nervous system.

Motor neurons – their work is to carry impulses from the main nervous system to an effector.

Connecting (Relay) neurons – their work is to connect sensory and motor centres.

18. You have touched a hot object. Represent diagrammatically the path that leads to a response, i.e., quickly pulling back the hand.

Ans: The diagrammatic representation of the path that leads to a response when we touch a hot object is as below,

Diagram showing reflex pathway on touching a hot object

19. Nervous and hormonal system together performs the functions of control and coordination in human beings. Justify the statement.

Ans: Nervous and hormonal systems together perform the function of control and coordination in human beings. Under stressed conditions, the stimulus is being perceived by the Central Nervous System which stimulates the adrenal gland that secretes the adrenaline hormone which prepares the body to face the emergency by increasing the breathing rate and heartbeat so that more oxygen can be supplied to the body. The blood supply decreases from the skin and digestive system and increases to skeletal muscles.

Nervous and Endocrine system maintaining Control and Coordination in Humans

20. What is the difference between a reflex action and walking?

Ans: Difference between reflex action and walking is given below:

21. Design an experiment to demonstrate hydrotropism.

Ans: To demonstrate hydrotropism, take a tin box and make a hole its bottom. Fill the tin with moist saw dust and sow some gram seeds in it. In the next step, when the seed starts germinating, keep the tin box in a tilted position. After some time when you water the tin, you will observe that the radicle moves towards the wet saw dust which demonstrates positive hydrotropism.

Experimental setup to demonstrate Hydrotropism

22. How does phototropism occur in plants?

Ans: Movement of shoot towards light is called phototropism. This movement is caused due to more growth of cells towards the shaded side of the shoot as compared to the side of the shoot towards light. More growth of cells is due to secretion of auxin towards the shaded side.

23. How does chemical coordination occur in plants?

Ans: Unlike animals, plants do not have a nervous system. Chemical coordination in plants is maintained by plant hormones also known as phytohormones. Some plant hormones are auxin, Gibberellins, Cytokinin etc. When sunlight falls on the side, the auxins hormone causes the shady side of the shoot to grow faster. Cytokinin is responsible for the cell division.

24. How are involuntary actions and reflex actions different from each other?

Ans: Difference between involuntary and reflex actions is given below:

25. Compare and contrast nervous system and hormonal control and coordination in animals.

Ans: Difference between nervous control and hormonal control is given below:

26. What is the difference between the manner in which movement takes place in a sensitive plant and movement in our legs?

Ans: Difference between movement in a sensitive plant and movement in our legs is given below:

27. On touching a hot plate, you suddenly withdraw your hand. Which category of neurons became active first and which one next?

Ans: Suddenly withdrawing the hand on touching a hot plate is an example of reflex action. Hence, first the sensory neurons are activated, which take the information to the spinal cord. After that, the motor neurons become active and bring the impulses from the brain to the muscles.

28. How does the plant shoot bends, when the plant is placed in a room having only one open window?

Ans: The shoot of the plant bends towards the direction of light when the plant is placed in such a room that has only one open window and this happens due to the auxin which is a plant growth hormone. Auxin diffuses towards the shady side of the shoot and stimulates the cells to live longer on the side of the shoot which is away from light.

29. Give a reason to explain why

adrenaline helps in dealing emergency situations?

Ans: Under stressed conditions, the stimulus is being perceived by the Central Nervous System which stimulates the adrenal gland that secretes the adrenaline hormone which prepares the body to face the emergency by increasing the breathing rate and heartbeat so that more oxygen can be supplied to the body. The blood supply decreases from the skin and digestive system and increases to skeletal muscles.

secretions of growth hormone should be specific in the human body?

Ans: Secretions of growth hormone should be specific in the human body because if growth hormones are secreted in excess quantity then it will lead to gigantism while the less secretion of this hormone causes dwarfism.

30. A man becomes unconscious due to head injury. A pin is pricked on his foot, he withdraws his foot. Why? Explain.

Ans: Withdrawal of the foot when a pin is pricked on the foot is an example of the reflex action and reflex actions are controlled by the spinal cord and not by the brain. Hence, although being injured on the head, the person will withdraw his foot.

Long Answer Questions (5 Marks)

1. Compare nervous and hormonal mechanism for control

2. Mention one function for each of these hormones.

Ans: Thyroxine controls the overall metabolic rate of the body.

Ans: Insulin converts glucose to glycogen in liver and muscles and controls the blood sugar level.

Ans: Adrenaline increases heartbeat and blood pressure.

Growth hormone

Ans: Growth hormones are responsible for body growth and development of bones.

Testosterone.

Ans: Testosterone is the male hormone and develops male sex organs and secondary sex characteristics like moustache, beard and voice.

3. Write the following:

What are hormones?

Ans: Hormones are chemical substances which help in growth, control and coordination of a living organism. They are secreted in very small amounts by endocrine glands.

list four characteristics of hormones

Ans: Four characteristics of hormones are –

They are required in very less amounts.

Hormones are specific in their function.

They act away from the site of production.

Deficiency or over secretions of hormones have negative effects in the body.

4. Describe Nervous systems in humans.

Ans: A flow chart of the human nervous system is given below:

Download Important Questions for Class 10 Science Chapter 7 PDF

Control and coordination class 10 important questions - summary.

Control and coordination Class 10 important questions include the topic namely nervous system muscular tissue correlation. This chapter also explains human brain anatomy, tissue protection, and nervous tissue action. It also gives brief information about animals and plants chemical coordination. The human body is a complex machine, which performs a ton of functions and processes to maintain and sustain human life. Living organisms must use systems providing chemical control and coordination. Keeping the general principles of body organisation in multicellular organisms. Specialised tissues are used to provide control and coordination activities.

Topics covered in Chapter 7 Science Class 10 important questions are - animal nervous system, reflex action, the human brain, coordination in the plant, response to the stimuli, movement due to growth, and also hormones in animals.

Nervous System - In the nervous system, neurons are the structural and functional unit of the nervous system. There are three parts in the neurons: dendrites, cyton/stoma/cell body and axon. Dendrites receive impulses from other neurons, cyton/soma processes the impulse. Axon transmits the impulse, either to another neuron or to muscles/glands, etc and it may be myelinated or unmyelinated. Nervous systems covered in the chapter are - central nervous system, peripheral nervous system, somatic nervous system, and autonomic nervous system.

Reflex Action - It is a sudden and involuntary reaction of the body in response to the stimuli. A reflex arc is a path followed by the electrical impulse during reflex action. The impulse travels from the receptor organ to the brain or spinal cord.

Plant Hormones and Movement - Control and coordination in plants is carried out by different hormones. Some of the plant hormones are auxin, cytokinin, gibberellins, abscisic acid and ethylene. There are two types of movement in plants: growth independent movements and growth-dependent movements. Growth related movements are also known as tropic movements. Some of the tropic movements are Phototropic movement (light dependent), Geotropic movement (gravity-dependent), Chemotropic movement (chemical-dependent), Hydrotropic movement (water-dependent), and Thigmotropic movement (touch dependent).

Endocrine System - Endocrine system in human secrets wide range of hormones for different functions. It consists of different glands like exocrine glands, endocrine glands, pituitary glands, thyroid gland, pancreas, adrenal gland, and gonads.

Benefits of Important Questions for Class 10 Science Chapter 7 - Control and Coordination

Given below are a few benefits that students will gain by referring to the Important Questions for Class 10 Science Chapter 7 .

The questions and solutions have been framed in a simple and easy-to-follow language. This has been done to aid students of all intellectual capabilities to ensure that they can prepare the chapter more effectively and perform excellently in their final exams.

Reading the chapter and learning the concepts are just the tip of the iceberg. To ensure you are prepared to score high marks in your exam, you need to practice the important questions of the chapter. This would in turn facilitate a better understanding of the topics covered in the chapter.

The questions and answers have been provided by our subject experts keeping in mind the latest CBSE exam pattern and updated syllabus to give you a real-time experience of the exams.

An important part of doing well in any exam is being good at time management skills. Solving the important questions while timing yourself will give you a fair idea of how prepared you are to appear for your actual exam.

To be sure that you aren’t taken by surprise when you face the actual question paper, it is strongly advisable that you solve the important questions. These important questions will help boost your confidence and improve your chances of scoring better marks in the exams.

After going through all Class 10 Science Ch 7 important questions , which provides fully solved solutions to all the questions, it helps the student to save time in their exam preparation. Class 10 Control and coordination important questions answers are designed in such a way that improves the confidence of the student by solving them. Before going through the important questions, let's go through the NCERT solutions of Class 10 Chapter 7. If you refer to all the Class 10 Science Chapter 7 important questions, you can easily score five marks in the board examinations.

Important Related Links for CBSE Class 10 Science

FAQs on Important Questions for CBSE Class 10 Science Chapter 7 - Control and Coordination 2024-25

1. Explain the nervous system according to Chapter 7 of Class 10 Science.

The nervous system is considered to be the most complex part of the body. The main function of the nervous system is to transmit signals to and from different parts of the body, the nervous system coordinates all the actions and sensory information. It is made up of the brain which acts as the control centre, the spinal cord which is the highway from the brain and all the nerves which carry the messages. The nervous system reacts to all the changes inside and outside the body.

2. What is control and coordination according to Chapter 7 of Class 10 Science?

In class 10 science, one of the most compelling chapters is Control and coordination. It is the seventh chapter of the class 10 science NCERT textbook. According to this chapter, control refers to the power of restraining and regulating a process. It even refers to the power of regulating pace in order to go fast, slow down, or stop completely. Whereas, Coordination refers to the process of different systems of an organism working together in order to create an appropriate stimuli reaction.

3. How can I ace Chapter 7 of Class 10 Science?

Chapter 7 of Class 10 Science is one of the most important chapters. It is one of the most scoring chapters for the CBSE Students. The simplest way of acing this chapter is by understanding the topics thoroughly. Using Vedantu’s Chapter 7 of Class 10 Science NCERT Solutions, students will gain more perspective and it will enrich their skills of learning. Using NCERT Solutions, students can solve practice papers which will give them more clarity on topics each individual student needs to concentrate on. This way a student can achieve the goal easily.

4. What do you mean by Reflex action according to Chapter 7 of Class 10 Science?

Reflex action is an important concept for class 10 Science. Reflex action is a fast, involuntary, spontaneous reaction to stimuli. It helps to reduce the damage to the body from any potentially harmful conditions. An example of a reflex action is touching something hot. As soon as you touch something hot, you spontaneously move it away from the hot object (this is reflex action). It is a very essential action for the survival of many organisms. A reflex action does not need any input or thought.

5. What are the important questions for Chapter 7 of Class 10 Science?

Chapter 7 of Class 10 Science is a very important chapter from the examination point of view. Using Vedantu’s Class 10 Chapter 7 Science important questions, students will have an upper hand in understanding the concepts and covering all the important aspects of each chapter. This will help all students wanting to score maximum marks, as all the important concepts and topics are organised. This will help students to prioritise the topics they need to concentrate on and perform better. The solutions or any study materials provided by Vedantu are absolutely free of cost.

CBSE Class 10 Science Important Questions

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Case Study Questions Class 7 Science Respiration in Organisms

Case study questions class 7 science chapter 10 respiration in organisms.

CBSE Class 7 Case Study Questions Science Respiration in Organisms. Important Case Study Questions for Class 7 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Respiration in Organisms.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 7 Science Respiration in Organisms

Case study 1.

A cell is the smallest structural and functional unit of an organism. Each cell of an organism performs certain functions such as nutrition, transport, excretion and reproduction. To perform these functions, the cell needs energy. Even when we are eating, sleeping or reading we require energy. The food has stored energy, which is released during respiration . Therefore, all living organisms respire to get energy from food. During breathing, we breathe in air.

Air contains oxygen. We breathe out air which is rich in carbon dioxide. The air we breathe in is transported to all parts of the body and ultimately to each cell. In the cells, oxygen in the air helps in the breakdown of food. The process of breakdown of food in the cell with the release of energy is called cellular respiration. Cellular respiration takes place in the cells of all organisms. In the cell, the food (glucose) is broken down into carbon dioxide and water using oxygen. When breakdown of glucose occurs with the use of oxygen it is called aerobic respiration. Food can also be broken down, without using oxygen. This is called anaerobic respiration. Breakdown of food releases energy.

Que. 1) What is the smallest structural and functional unit of an organism?

(d) All of the above

Que. 2) All living organisms derive their energy form which of the following?

(b) Nutrient

Que. 3) The breakdown of glucose in the presence of oxygen is called as …………………………………………………………………………………………………. .

(a) Aerobic respiration.

(b) Anaerobic respiration.

(d) All of the above.

Que. 4) What is cellular respiration?

Que. 5) What is the function performed by each cell of the organisms?

Que. 1) (c) Cell.

Que. 2) (c) Food.

Que. 3) (a) Aerobic respiration.

Que. 4) Answer: The process of breakdown of food or breakdown of complex food particle into simpler form with the release of energy within the cell is called as cellular respiration.

Que. 5) Answer: The function performed by each cell are: Nutrition, absorption of food, transport, excretion of waste materials and reproduction etc.

Case study 2

Our muscle cells can also respireanaerobically, but only for a short time,when there is a temporary deficiency ofoxygen. During heavy exercise, fast

running, cycling, walking formany hours or heavy weight lifting, the

Demand for energy is high. But thesupply of oxygen to produce the energy

Is limited. Then anaerobic respirationtakes places in the muscle cells to fulfil

The demand of energy:

Glucose ____ ( in muscle) in the absence of oxygen ______> lactic acid + energy

The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps. We get relief from cramps after ahot water bath or a massage. Hot water bath or massage improves circulation of blood.As a result, the supply of oxygen to themuscle cells increases. The increase in

the supply of oxygen results in thecomplete breakdown of lactic acid into

carbon dioxide and water.

Que. 1) Can muscle cells respire anaerobically?

Que. 2) Which substance causes muscle cramps during strenuous workout or any other hardcore training?

(a) Lactose acid

(b) Glucose

Que. 3) We get relief form cramps after ………………………..……………………………………………..……………………… and ………………………………………………………………………………………… .

(a) Hot water bath and massage.

(b) Cold water bath.

Que. 4) When is the demand of energy is high in human body?

Que. 5) How is lactic acid broken down?

Que. 1) (a) True.

Que. 2) (c) Lactic acid.

Que. 3) (a) Hot water bath and massage.

Que. 4) Answer: The demand of energy is high in the human body when the body put into a lot of physical stress like walking, hiking, cycling, swimming, and running.

Que. 5) Answer: When the supply of oxygen is increased the lactic acid is broken down into carbon dioxide and water.

Case study 3

Breathing means taking in air rich in oxygen and giving out air rich incarbon dioxide with the help of respiratory organs. The taking in of airrich in oxygen into the body is called inhalation and giving out of air rich in carbon dioxide is known as exhalation. It is a continuous process which goes on all the time and throughout the life of an organism.The number of times a personbreathes in a minute is termed as thebreathing rate. During breathing inhalation and exhalation take place alternately.

A breath means one inhalation plus one exhalation On an average, an adult human being at rest breathes in and out 15–18 times in a minute. During heavy exercise, the breathing rate can increase upto 25 times per minute. While we exercise, not only do we breathe fast, we also take deep breaths and thus inhale more oxygen

Que. 1) Breathing means taking in air rich in ………………………………………………………………………………….. and giving out ………………………………………………………………………… with the help of lungs.

(a) Co 2 and O 2

(b) O 2 and Co 2

Que. 2) How much a normal human being breathe during rest?

(a) 15-18 times

(b) 65 times

(d) 120 times

Que. 3) What is the breathing rate during heavy exercise?

(a) 30 times

(b) 40 times

(d) 100 times

Que. 4) Define inhalation and exhalation?

Que. 5) Define breathing rate?

Que. 1) ( b) O 2 and Co 2.

Que. 2) ( a) 15-18 times.

Que. 3) ( c) 25 times.

Que. 4) Answer: The intake of air rich in oxygen is called as inhalation and the giving out of air rich in carbon dioxide is called as exhalation.

Que. 5) Answer: Breathing rate is defined as the number of times a person breaths per minute.

Case study 4

Normally we take in air through our nostrils. When we inhaleair, it passes through our nostrils into the nasal cavity. From the nasal cavity,the air reaches our lungs through the windpipe. Lungs are present in the chest cavity. This cavity is surrounded by ribs on the sides. A large, muscular sheet called diaphragm forms the floor of the chest cavity. Breathing involves the movement of the diaphragm and the rib cage. During inhalation, ribs move up andoutwards and diaphragm moves down. This movement increases space in ourchest cavity and air rushes into the lungs. The lungs get filled with air. During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs Smoking damages lungs. Smoking is also linked to cancer. It must be avoided .

Que. 1) From where does we take in air normally?

Que. 2) What is leads to lung cancer?

(a) Smoking

(b) Alcohol

Que. 3) Where are the lungs present?

(a) Buccal cavity

(b) Chest cavity

Que. 4)During inhalation how does the ribs move?

Que. 5) Who forms the floor of the chest cavity?

Que. 1) (c) Nostrils.

Que. 2) (a) Smoking.

Que. 3) (b) Chest cavity

Que. 4) Answer: During inhalation the ribs move in upwards and outward directions.

Que. 5) Answer: Diaphragm forms the floor of the chest cavity which is a large muscular sheet.

Case study 5

Animals such as elephants, lions, cows, goats, frogs, lizards, snakes, birds, have lungs in their chest cavities like the human beings. Cockroach: A cockroach has small openings on the sides of its body. Other insects also have similar openings. These openings are called spiracles. Insects have a network of air tubes called tracheae for gas exchange. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body.

Similarly, carbon dioxide from the cells goes into the tracheal tubes and moves out through spiracles. These air tubes or tracheae are found only in insects and not in any other group of animals. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them. Though frogs have a pair of lungs like human beings, they can also breathe through their skin, which is moist and slippery.

Que. 1) Which of the following animal have lungs like human beings?

Que. 2) The trachea is found only in the ……………………………………………………………………………………… and no other group of animals.

Que. 3) …………………………………………………..………………………….. organism can breathe through their skin.

(b) Reptiles

Que. 4) What are the small openings on the sides of cockroach’s body?

Que. 5) How does the skin of earthworms feel on touching?

Que. 1) (d) All of the above.

Que. 2) (a) Insect.

Que. 3) (d) Frog.

Que. 4) Answer: The small opening on the sides of a cockroach’s body is called as spiracle.

Que. 5) Answer: one touching the skin of the earthworm one would feel it moist and slimy.

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CBSE Notes For Class 10
Class 10 Science Notes
Chapter 7: Control And Coordination

CBSE Class 10 Science Chapter 7 Control and Coordination Notes

According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 6.

Class 10 Science Notes Chapter 7 Control and Coordination

Introduction.

The human body is a complex machine performing tons of functions and processes to maintain and sustain life. Explore how the body controls its movements and coordinates its actions with other parts of the body and the environment by exploring notes for Class 10 Chapter 7 Control and Coordination.

The Nervous System

Movement in organisms.

The ability of organisms to move certain body parts is movement . When they move from one place to another, it is called locomotion .

Organisms show movements in response to stimuli.

Introduction to Control & Coordination

Organisms move in response to various kinds of stimuli like light, heat, nutrients/food, etc.
All the activities in animals are controlled and coordinated by the nervous and endocrine systems.
Hormones are chemical messengers which assist the nervous system in carrying out various functions. They are secreted by endocrine glands.
Hormones in plants coordinate the movements.

For more information on Nervous System, watch the below video

To know more about The Nervous System, visit here .

Neuron is the structural and functional unit of the nervous system.

Each neuron has three main parts: dendrites, cyton/soma/cell body and axon.
Dendrites receive impulses from other neurons.
Cyton/soma processes the impulse.
Axon transmits the impulse, either to another neuron or to muscles/glands, etc.
Axon may be myelinated or non-myelinated.
The impulse transmission is faster in myelinated neurons .

CBSE Class 10 Science notes Chapter 7 - 1

Central Nervous System

The central nervous system (CNS) is made up of the brain and the spinal cord. The functions of different parts of the brain are:

The cerebrum is responsible for reasoning, logic, emotions, speech, memory, visual processing, recognition of auditory and taste stimuli, etc.
Cerebellum regulates and coordinates body movements, posture and balance.
Pons relays signals from the hindbrain to the forebrain.
Medulla Oblongata controls all involuntary movements like vomiting, sneezing, yawning, heartbeat, breathing, blood pressure, etc.
Medulla oblongata continues as the spinal cord, which runs through the vertebral column and it controls reflex actions.

CBSE Class 10 Science notes Chapter 7 - 2

Peripheral Nervous System

The nerves coming out from the brain and the spinal cord constitute the peripheral nervous system (PNS).
There are 12 cranial nerves and 31 spinal nerves in humans.

Somatic Nervous System

It forms a part of the PNS.
The nerves of PNS that control the voluntary actions of the body form the somatic nervous system.

Autonomic Nervous System

All the nerves of the PNS that control the involuntary actions in the body form the autonomic nervous system. E.g. respiration, heart rate, blood pressure, digestion, etc., are regulated by the autonomic nervous system.
Two divisions of the autonomic nervous system are the sympathetic and parasympathetic nervous systems.
The sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response, while the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high-energy functions.

Reflex Action

Reflex action is a sudden, involuntary reaction of the body in response to stimuli.

To know more about Reflex Action, visit here .

It is the path followed by an electrical impulse during a reflex action.
The impulse travels from the receptor organ to the spinal cord/brain. It is processed there, and the information is brought back to the concerned muscle to carry out the action.
Thus, the receptor organ, sensory/afferent neuron, interneuron, motor/efferent neuron and effector organ are the components of a reflex arc.

CBSE Class 10 Science notes Chapter 7 - 3

Protection of CNS

The brain is protected by 3 main layers –

The bony skull (cranium)
The cerebrospinal fluid
The meninges (Dura mater, Arachnoid and Pia mater).

For more information on Brain, watch the below video

Plant Hormones and Movements

Plant hormones.

Control and coordination in plants are carried out by hormones.

To know more about Plant hormones, visit here .

Growth Independent Movements

The movements which are not growth related are called nastic movements. These movements occur in response to environmental stimuli but the direction of response is not dependent on the direction of the stimulus.

The movement in the touch-me-not plant is thigmonastic movement (movement in response to touch).

Growth-Related Movements in Plants

The movements which are growth related are called tropic movements. These movements occur in response to environmental stimuli and the direction of the response is dependent on the direction of the stimulus.

For more information on Tropic Movements in Plants, watch the below video

To know more about Tropic Movements in Plants, visit here .

Phototropic movement (light-dependent)
Geotropic movement (gravity-dependent)
Chemotropic movement (chemical-dependent)
Hydrotropic movement (water-dependent)
Thigmotropic movement (touch dependent)

Movement of plant parts in response to earth’s gravitational force is known as geotropism/gravitropism.

Towards gravity – positive geotropism
Away from gravity – negative geotropism
The root grows towards gravity, and the shoot grows away from gravity

Phototropism

Movement of plant parts in response to light is known as phototropism.

Towards light-positive phototropism.
Away from light – negative phototropism.
Stems move towards the light, and roots move away from the light.

To know more about Phototropism, visit here .

Hydrotropism

Movement of plant parts in response to water or moisture.

Towards water-positive hydrotropism.
Away from water – negative hydrotropism.
Again, root movement in search of water is positive hydrotropism.
E.g. movement of roots towards high humidity level.

Chemotropism

Movement of plant parts in response to chemical stimuli is known as chemotropism.

Towards chemical-positive chemotropism.
Away from chemical-negative chemotropism.
The growth of the pollen tube towards the ovule is positive chemotropism.

Thigmotropism

Movement of plant parts in response to touch is called as thigmotropism.

Towards touch – Positive thigmotropism.
Away from touch – negative thigmotropism.
Movement of tendrils around the support is positive thigmotropism.

The Endocrine System

Exocrine glands.

Exocrine glands are glands that discharge secretions by means of ducts, which open onto an epithelial surface.

Endocrine Glands

Endocrine glands are the ductless glands which secrete hormones into the bloodstream in humans.

The endocrine glands present in the human body are the pituitary, thyroid, adrenal, pineal, pancreas, ovary (female), testis (male), etc. Let us now learn more about each of the glands below.

For more information on Endocrine Glands, watch the below video

To know more about Exocrine glands, visit here .

Pituitary Gland

It is a pea-sized gland located at the base of the brain.
It is the master gland, as it controls the secretions of all the other endocrine glands.
It also secretes Growth Hormone (GH). Under-secretion of GH causes Dwarfism, and over-secretion causes Gigantism in children and ‘Acromegaly’ in adults.

To know more about the Pituitary gland, visit here .

Thyroid Gland

It is a butterfly-shaped gland located in the throat.
It secretes the hormone ‘Thyroxine’, which regulates the metabolism of the body.
Iodine is required to synthesize thyroxine in the body.
In the case of iodine deficiency, under-secretion of thyroxine leads to goitre.

To know more about the Thyroid gland, visit here .

It is a leaf-like gland present behind the stomach in the abdomen.
It is an endocrine as well an exocrine gland.
As an endocrine gland, it manufactures two hormones – Insulin and glucagon. Both these hormones act antagonistically and regulate the sugar level in the blood.
As an exocrine gland, it secretes enzymes to break down the proteins, lipids, carbohydrates and nucleic acids in food.
An insufficient amount of insulin from the pancreas leads to diabetes.

To know more about Pancreas, visit here .

Adrenal Gland

Occurs in pairs above each kidney.
It decreases in size with age.
Secrets the hormone adrenaline, which helps in flight and fight response.
Also secretes noradrenaline.

To know more about the Adrenal gland, visit here .

Gonads are the gamete-producing organs – testes in males and ovaries in females.
The testes produce the male hormone testosterone, and the ovaries produce the female hormones oestrogen and progesterone.
Testosterone and oestrogen help in producing gametes and are responsible for the sexual characteristics of males and females, respectively.
Progesterone is the pregnancy hormone.

To know more about Gonads, visit here .

Other Endocrine Organs

The other endocrine organs include the hypothalamus, parathyroid, pineal and thymus glands.

To know more about The Endocrine System, visit here .

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Frequently Asked Questions on CBSE Class 10 Science Notes Chapter 7 Control and Coordination

What is the function of the central nervous system.

The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the centre of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

What are some facts about the human brain?

1. 60% of the human brain is composed of fat.

2. The brain contains about 100 billion neurons and 100 trillion connections.

3. The texture of the brain is similar to that of firm jelly.

How many parts does the human eye have?

The human eye totally consists of 7 parts that work together.

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Case Study Questions for Class 10 Science Chapter 7 Control and
Case Study Questions for Class 10 Science Chapter 7 Control and Coordination. Question 1: Read the case/passage and answer the questions given below. To carry out a simple function such as eating food there has to be coordination of the eyes, hands and the mouth. The eyes have to focus on the food, the hands have to pick it up and take it to ...
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