case study questions class 7 respiration in organisms

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.

(c) 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

(c) Lactic acid

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

(a)  Hot water bath and massage.

(b) Cold water bath.

(c) Massage.

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

(c) N 2 and C 2

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

(a) 15-18 times

(b) 65 times

(c) 100 times

(d) 120 times

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

(a) 30 times

(b) 40 times

(c) 25 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?

(c) Nostrils

Que. 2) What is leads to lung cancer?

(a) Smoking

(b) Alcohol

(c) Pollution

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.

• Naman sehgal September 15, 2023 at 4:28 pm Reply

+these are amazing

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Case Study Questions for Class 7 Science Chapter 10 Respiration in Organisms

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Here we are providing case study or passage-based questions for class 7 science chapter 10 Respiration in Organisms .

Case Study/Passage Based Questions

Respiration is a basic characteristics of all living beings. It is an energy releasing reaction. The living cells break down complex high energy food molecules into simple low energy molecules by oxidation, forming carbon dioxide and water. By this a large amount of energy is released which is used to maintain life activities by the organism.

• Respiration in human beings: (a) involves exchange of gases (b) involves inspiration and expiration (c) involves oxidation of glucose (d) All of the above are correct
• Which type of respiration is found in yeast? (a) Aerobic respiration (b) Anaerobic respiration (c) Respiration using oxygen (d) None of these
• In the process of respiration following gets oxidised? (a) oxalic acid (b) glucose (c) lactic acid (d) All of these

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Case study or passage-based questions in class 7 Science typically require students to read a given scenario or passage and answer questions based on the information provided. These questions assess students’ comprehension, analytical thinking, and application of scientific concepts. 

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To develop a strong command on class 6 Science case study questions, you can follow these steps:

• Read the textbook and study materials:  Familiarize yourself with the concepts and topics covered in your class 6 Science curriculum. Read the textbook thoroughly and take notes on important information.
• Practice analyzing case studies:  Look for case studies or passages related to class 6 Science topics. Analyze the given information, identify key details, and understand the context of the situation.
• Develop comprehension skills:  Focus on improving your reading comprehension skills. Practice reading passages or articles and try to summarize the main points or extract relevant information. Pay attention to details, vocabulary, and the overall structure of the passage.
• Understand scientific concepts:  Ensure that you have a solid understanding of the scientific concepts discussed in class. Review the fundamental principles and theories related to each topic.
• Make connections:  Try to connect the information provided in the case study to the concepts you have learned in class. Identify any cause-effect relationships, patterns, or relevant scientific principles that apply to the situation.
• Practice critical thinking:  Develop your critical thinking skills by analyzing and evaluating the information given in the case study. Think logically, consider multiple perspectives, and draw conclusions based on the evidence provided.
• Solve practice questions:  Look for practice questions or sample case study questions specifically designed for class 6 Science. Solve these questions to apply your knowledge, practice your analytical skills, and familiarize yourself with the format of case study questions.
• Seek clarification:  If you come across any challenging concepts or have doubts, don’t hesitate to ask your teacher for clarification. Understanding the underlying principles will help you tackle case study questions effectively.

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• NCERT Exemplar
• NCERT Exemplar Class 7
• Class 7 Science
• Chapter 10 Respiration In Organisms

NCERT Exemplar Solutions Class 7 Science Chapter 10 Respiration In Organisms

NCERT Exemplar Solutions for Class 7 Science Chapter 10 Respiration in Organisms aid you in understanding the important topics involved in the respiratory system in humans and a few animals and plants. After solving these exemplar questions, you will get familiar with the important diagrams and charts from which questions are asked regularly in the Class 7 annual examinations.

NCERT Exemplar Solutions for Class 7 Science will guide students in understanding the topics covered in each chapter as per the latest CBSE syllabus. By providing answers to questions of varying difficulty levels, they make your fundamentals strong and will help you in studying advanced topics in your higher classes.

NCERT Exemplars Solutions provide answers and explanations for multiple-choice questions, answers to short answer questions, and detailed explanations for the long answer questions present in NCERT exemplar books.

Download the PDF of NCERT Exemplar for Class 7 Science Chapter 10 – Respiration in Organisms

Benefits of NCERT Exemplar Solutions for Class 7 Science Chapter 10 Respiration in Organisms.

• It covers answers to all the questions provided in NCERT exemplar problems of Class 7 Chapter 10.
• It helps you in building a strong foundation for studying advanced topics on human physiology in the future.
• It helps in preparing for competitive examinations.
• It covers all the key points on the fundamentals of respiration in organisms.

Subtopics Covered in NCERT Exemplar Solutions for Class 7 Science Chapter 10 Respiration in Organisms.

10.1 – Why Do We Respire?

10.2 – Breathing

10.3 – How Do We Breathe?

10.4 – What Do We Breathe Out?

10.5 – Breathing in Other Animals

10.6 – Breathing under Water

10.7 – Do Plants Also Respire?

Access Answers to NCERT Exemplar Class 7 Science Chapter 10 – Respiration in Organisms

Multiple-choice questions.

1. Sometimes, when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

(a) alcohol and lactic acid

(b) alcohol and CO2

(c) lactic acid and CO2

(d) lactic acid only

The answer is (d) lactic acid only

Explanation:

During exercise, oxygen gets used up faster, to meet the energy requirement, our body shifts to anaerobic respiration, because of which lactic acid is produced in place of pyruvic acid.

2. Yeast is used in the wine and beer industries because it respires

(a) aerobically producing oxygen.

(b) aerobically producing alcohol.

(c) anaerobically producing alcohol.

(d) anaerobically producing CO2.

The answer is (c) anaerobically producing alcohol.

Yeast respires anaerobically to produce ethanol and CO 2 . Due to this property, it is used in the production of ethanol and alcoholic drinks.

3. During the process of exhalation, the ribs move

(a) down and inwards.

(b) up and inwards.

(c) down and outwards.

(d) up and outward.

The answer is (a) down and inwards.

During exhalation, the diaphragm moves up, and ribs move downwards and inwards, decreasing the space in the chest cavity, this increases the air pressure inside the lungs and forces the air out of the lungs.

4. Breathing is a process that

(i) provides O2 to the body.

(ii) breaks down food to release energy.

(iii) helps the body to get rid of CO2.

(iv) produces water in the cells.

Which of the following gives the correct combination of functions of breathing?

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i) and (iii)

(d) (ii) and (iv)

The answer is (c) (i) and (iii)

Breathing is a process oxygen-rich air is taken inside the body and carbon-di-oxide rich air is expelled from the body with the help of respiratory organs.

5. Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to

(a) take in oxygen from the air.

(b) take in oxygen dissolved in water.

(c) absorb nutrients present in water.

(d) release waste substances in water.

The answer is (b) take in oxygen dissolved in water.

Fishes use gills for the exchange of gases. As the water enters through mouth it flows through gills. Capillaries in the gills absorb oxygen dissolved in water and also help in expelling out CO 2 from the body.

6. Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

(a) moist and rough.

(b) dry and rough.

(c) dry and slimy.

(d) moist and slimy.

The answer is (d) moist and slimy.

The exchange of gases in earthworms and frogs takes place by diffusion through moist body hence their skin appears moist and slimy.

Very Short Answer Questions

7. Mark the following statements as True or False. Correct the false statements.

(a) Oxygen breaks down glucose outside the cells of organisms.

(b) Frogs can breathe through their skin as well as lungs.

(c) Insects have spiracles on the lower surface of the body.

(d) Exhaled air has more percentage of CO2 than inhaled air.

a) False- Oxygen breaks down glucose inside the cells of organisms.

c) False- Insects have spiracles on the sides of the body.

8. Fill in the blanks with suitable words. (a) The roots of a plant take up oxygen from the ______ trapped between the ________ particles. (b) Diaphragm forms the ___________ of the chest cavity. (c) The exchange of gases in the leaves takes place with the help of __________. (d) Cockroaches breathe with the help of air tubes called ___________.

(a) The roots of a plant take up oxygen from the Air trapped between the soil particles. (b) The diaphragm forms the floor of the chest cavity. (c) The exchange of gases in the leaves takes place with the help of stomata . (d) Cockroaches breathe with the help of air tubes called tracheae.

Short Answer Questions

9. Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give a reason for your answer.

(a) cockroach, grasshopper, snail, ant

(b) lizard, cow, earthworm, snake

(c) crocodile, whale, dolphin, fish

(d) snake, tadpole, crow, goat

a) Snail- Because snail does not breathe by trachea, whereas cockroach, grasshopper and ants breathe by the trachea

b) Earthworm-because it breathes through its skin and it does not have lungs.

c) Fish- because fish don’t have lungs and they breathe by their gills.

d) Tadpoles- because tadpoles don’t have lungs and they breathe by their gills.

10. Which gas present in the air is essential for aerobic respiration? What is the role of oxygen during respiration?

Atmospheric oxygen is essential for the process of aerobic respiration. Respiration is important because oxygen

breaks down food and releases energy.

11. On average, an adult human being at rest breathes 15–18 times per minute. The breathing rate, however, may differ under different conditions. Arrange the following activities given in the box in order of increasing breathing rates and give a reason for your answer.

sleeping > watching T.V. > brisk walk > cycling

When a person performs a physical activity, breathing becomes faster. Because of this, more oxygen is required by the cells to get more energy.

12. On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

When the climate is cold warm and moist air exhaled by us condenses into mist when it comes in contact with the cold air of the atmosphere. This looks like smoke coming out of our mouth.

13. Whenever we feel drowsy or sleepy, we start yawning. Does yawning help us in any way?

When we feel sleepy, the rate of respiration slows down. Because of this, lungs will not get enough oxygen and we yawn. Yawning brings extra oxygen to the lungs and helps us in being awake.

14. Insects and leaves of a plant have pores through which they exchange gases with the atmosphere. Can you write two points of differences between these pores with respect to their position, number and extension into the body?

(i) Spiracles are present on the sides of the insects’ body while stomata are present on the lower surface of leaves.

(ii) Spiracles are fewer in number as compared to stomata.

(iii) Spiracles lead to an extensive network of a tracheal system which is absent in the leaves.

15. Paheli participated in a 400 m race competition held at her school and won the race. When she came home, she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage, she was relieved of the pain. Answer the following questions related to the situation.

(a) What can be the possible reasons for the pain in her legs?

(b) Why did she feel comfortable after a massage?

a) Pain in her legs might be because of the accumulation of lactic acid in her muscles. During heavy physical activity muscle, cells respire anaerobically, producing lactic acid.

b) The massage gave her relief because it improves the circulation of blood, leading to an increased supply of oxygen

to the muscle cells, which helps the incomplete breakdown of lactic acid into CO2 and water.

16. Observe Figure 10.1 carefully and answer the following questions.

(a) In which jar, will the amount of CO 2 be the highest and why?

(b) In which jar, will the amount of CO 2 be the lowest and why?

a) Amount of CO 2 will be the highest in jar C because mice in Jar C will breathe out CO 2, which results in the accumulation CO 2 in the jar C.

b) Amount of CO 2 will be the lowest in jar A because CO2 in jar A will be utilized by plants to breathe.

17. Observe Figure 10.2 carefully and answer the following questions.

(a) Which process is being tested in the activity?

(b) What is the result of the activity? Give reasons.

a) This experiment is used to test the Exhalation process during respiration.

b) Lime water turns milky in test tube B and test tube A remains unchanged because CO2 is present in

the exhaled air mixes with lime water in ‘B’ and turns it milky.

18. A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After a few hours, the dough had risen. There was a sour smell too.

(a) Why did the dough rise?

(b) Why did the dough smell sour?

(c) Why was sugar added to the dough?

(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?

a) CO2 produced by yeast during respiration makes the dough rise

b) During anaerobic respiration yeast produces alcohol. This gives sour smell to the dough.

c) Sugar acts as food for yeast

d) If kept in the refrigerator, yeast will not respire and multiply and the dough will not rise and will not produce a sour smell.

19. Observe the figures given in Figure 10.3 (A) and (B) and answer the following.

(a) Which of the figures A or B indicates the process of inhalation and which the process of exhalation?

(b) In the figure label the arrows and indicate the direction of

(i) movement of air

(ii) movement of diaphragm

(iii) movement of ribs

a) Fig. (A) indicates inhalation, and Fig. (B) indicates exhalation.

20. Match the names of organisms in Column I with their organs of breathing given in Column II.

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Frequently Asked Questions NCERT Exemplar for Class 7 Science Chapter 10 Respiration in Organisms

Which gas present in the air is essential for aerobic respiration what is the role of oxygen during respiration.

Atmospheric oxygen is essential for the process of aerobic respiration. Respiration is important because oxygen breaks down food and releases energy.

Whenever we feel drowsy or sleepy, we start yawning. Does yawning help us in any way?

When we feel sleepy, the rate of respiration slows down. Because of this, our lungs will not get enough oxygen, and we yawn. Yawning brings extra oxygen to the lungs and helps us staying awake.

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NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms

Chapter 10 Respiration in Organisms Class 7 Science NCERT Solutions

Class 7 science chapter 10 respiration in organisms ncert questions and answers - topics, class 7 science chapter 10 respiration in organisms ncert questions and answers - notes, chapter 10 respiration in organisms class 7 science questions and answers - mcq questions with answers, contact form.

NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms

NCERT Solutions for CBSE Class 7 Science Chapter 10 Respiration in Organisms are given below. These solutions help students to clear their doubts and to obtain good marks in final exam. Class 7 Science NCERT questions and answers provided in this article are strictly based on the CBSE syllabus and curriculum.

Class 7 Science Chapter 10 Respiration in Organisms NCERT Solutions

Class 7 NCERT Solutions for Science Chapter 10 includes all the intext and exercise questions. All these questions are solved by experts with a detailed explanation that will help students complete their assignments and homework.

Question 1: Why does an athlete breathe faster and deeper than usual after finishing the race?

Answer: An athlete needs to supply extra energy to his muscle cells which have worked hard during running. For this, he breathes faster and deeper so that more oxygen is supplied to the cells. This speeds up the breakdown of food and as a result, more energy is released.

Question 2: List the similarities and differences between aerobic and anaerobic respiration.

Answer: Similarities: Food is oxidized in both cases and energy is released.

Differences:

Question 3: Why do we often sneeze when we inhale a lot of dust-laden air?

Answer: We often sneeze when we inhale a lot of dust-laden air to expel out these foreign particles. These particles get past the hair in the nasal cavity and irritate the lining of the cavity which results in sneezing.

Question 4: Take three test-tubes. Fill each of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test- tube would have the highest concentration of CO 2 ?

Answer: Test tube A will have the highest concentration of CO 2.  This is because test tube A contains snail. Snail is an organism that breathes in O 2  and breathes out CO 2 . Hence, CO 2  concentration increases in test tube A.

Test tube B contains a water plant, which takes in CO 2  for food synthesis and gives out O 2 . Hence, more O 2  concentration is found in test tube B.

Test tube C contains both a snail and a plant. The CO 2  produced by the snail is utilized by the plant for its food synthesis and the O 2  released by the plant is utilized by the snail for respiration.

Therefore, test tube A has the highest concentration of CO 2 .

Question 5: Tick the correct answer

(a) In cockroaches, air enters the body through

(i) lungs (ii) gills (iii) spiracles (iv) skin

Answer: (a) (iii) spiracles

(b) During heavy exercise, we get cramps in the legs due to the accumulation of

(i) carbon dioxide (ii) lactic acid (iii) alcohol (iv) water

Answer: (b) (ii) lactic acid

(c) Normal range of breathing rate per minute in an average adult person at rest is: (i) 9 – 12 (ii) 15–18 (iii) 21–24 (iv) 30–33

Answer: (c) (ii) 15–18

(d) During exhalation, the ribs

(i) move outwards             (ii) move downwards (iii) move upwards   (iv) do not move at all

Answer: (d) (ii) move downwards

Question 6: Match the items in Column I with those in Column II:

Question 7: Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) During heavy exercise the breathing rate of a person slows down. (T/F)

(ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)

(iii) Frogs breathe through their skins as well as their lungs. (T/F)

(iv) The fishes have lungs for respiration. (T/F)

(v) The size of the chest cavity increases during inhalation. (T/F)

Answer: (i) False (ii) False (iii) True (iv) False (v) True

Question 8: Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction – upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.

(i) The air tubes of insects (ii) Skeletal structures surrounding chest cavity (iii) Muscular floor of chest cavity (iv) Tiny pores on the surface of leaf (v) Small openings on the sides of the body of an insect (vi) The respiratory organs of human beings (vii) The openings through which we inhale (viii) An anaerobic organism (ix) An organism with tracheal system

(i) The air tubes of insects → Trachea (ii) Skeletal structures surrounding chest cavity → Ribs (iii) Muscular floor of chest cavity → Diaphragm (iv) Tiny pores on the surface of leaf → Stomata (v) Small openings on the sides of the body of an insect → Spiracles (vi) The respiratory organs of human beings → Lungs (vii) The openings through which we inhale → Nostrils (viii) An anaerobic organism → Yeast (ix) An organism with tracheal system → Ant

Question 9: The mountaineers carry oxygen with them because:

(a) At an altitude of more than 5 km there is no air. (b) The amount of air available to a person is less than that available on the ground. (c) The temperature of air is higher than that on the ground. (d) The pressure of air is higher than that on the ground.

Answer: (b) The amount of air available to a person is less than that available on the ground

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• Respiration in Organisms Class 7 Notes CBSE Science Chapter 10 (Free PDF Download)
• Revision Notes

Revision Notes for CBSE Class 7 Science Chapter 10 - Respiration in Organisms Free PDF Download

Respiration in Organisms Class 7 notes aim to help the students in revising the chapter and preparing well for their exams. The revision notes have been carefully curated by the experts at Vedantu after a detailed study of the chapter. They have been made in accordance with the updated syllabus and include all the critical topics on which questions can be framed in the exams.

It is essential for students to grasp the basics of science in class 7 so that they can understand the specialized knowledge in higher classes. NCERT Solutions Class 7 Science Respiration in organisms notes will help the students in revising the whole chapter in lesser time without missing out on any important point. The explanations given in a detailed format will help the students in formulating their answers to questions based on the topic. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions, they can download Class 7 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

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Access Class 7 Science Chapter 10 - Respiration in Organisms Notes

Respiration is required for living organisms to survive. 

It takes energy from the food and releases it.

Glucose is broken down into carbon dioxide and water with the oxygen we breathe.

In the process, energy is released.

Glucose is broken down in an organism's cells (cellular respiration).

Food is broken down by anaerobic respiration during strenuous activity when the supply of oxygen to our muscle cells is insufficient (without oxygen)

Types of Respiration

External Respiration:

External respiration, often known as breathing, is the process of taking oxygen from the air and exhaling carbon dioxide back into the atmosphere.

Gases are exchanged in and out of the blood at the same time.

Internal Respiration:

Food is broken down in body cells by numerous chemical processes during internal respiration.

Internal respiration is divided into two categories:

Aerobic Respiration:

Aerobic respiration occurs when oxygen is present.

The end products of aerobic respiration are carbon dioxide and water. 

Aerobic respiration occurs in the majority of organisms.

Anaerobic Respiration:

Anaerobic respiration occurs when there is no oxygen present.

The majority of microorganisms are capable of anaerobic respiration. 

At the end of anaerobic respiration, alcohol and carbon dioxide are produced. 

Lactic acid is generated at the end of anaerobic respiration in some circumstances.

Respiration in Plants:

Plants breathe through pores called stomata, which allow gaseous exchange via diffusion.

Lenticels are apertures in stems that allow gaseous exchange via diffusion.

Stomatal pores in roots allow for the gaseous exchange of oxygen dissolved in soil water.

Respiration in Animals:

Animals' respiration differs depending on their personality, such as:

Earthworms use their skin for respiration.

Insects do respiration through the entire body surface.

Gills are used by fish to breathe.

Frogs do respiration through their thin, moist, and smooth skin in the water and through their lungs on land.

Respiration in Humans:

Inhaled air enters the nasal cavity through the nostrils and then into the lungs via the windpipe.

Breathing is a portion of the respiration process, in which an organism takes in oxygen-rich air and exhales carbon dioxide-rich air. 

Distinct creatures have different respiratory organs for gas exchange.

Our lungs expand during intake and subsequently contract when the air leaves our bodies during exhalation.

The pace of breathing is accelerated by increased physical exertion.

The respiratory organs and breathing process of animals such as cows, buffaloes, dogs, and cats are comparable to those in humans.

CBSE Class 7 Science Respiration in Organisms Notes

The question paper in the exams include questions based on the essential and critical topics of a chapter and sometimes students are not able to gauge the weightage of time they must give to each topic. Ch 10 Science Class 7 notes will help the students to know which are the important topics and help them in learning them easily. There is always a scarcity of time before the exams and by going through these concise notes, students can save the precious time that they will spend on reading the whole chapter.

Notes of Class 7 Science Chapter 10 will also help the students in formulating their answers in the right format. These notes present the information in a pointwise format that students can use while writing their answers in the exams.

Notes on Respiration in organisms class 7 explain the concept of respiration by giving its concise and clear definition. The oxygen we inhale during respiration is used to break down the glucose into carbon dioxide and water. This process leads to an energy release. To know more about the meaning and the process of respiration, students can refer to the NCERT Class 7 Science Chapter 10 notes. The process of respiration and its importance has been explained in points that are easy to remember and can be elaborated on by the students in the exams.

Students can access these notes online at any time and refer to them while reading the chapter also. They are a ready reckoner any time when the students are revising the chapter. The answers provided are concise and short and can be easily learned by the students.

Respiration can be classified into internal respiration and external respiration on the basis of the process involved. Internal respiration can further be classified into aerobic respiration and anaerobic respiration. This classification is done on the basis of the presence of oxygen in the process of respiration. Students can learn about these classifications in an explanatory manner through Class 7 Science Ch 10 notes.

The chapter Respiration in organisms will educate the students about the respiration process in different kinds of organisms namely plants, animals, and humans. Different types and species of animals have different respiratory processes. For example, earthworms use their skin to breathe. The experts have included such examples from Class 7th NCERT Science Chapter 10 in these notes.

The revision notes also include points to remember about breathing. Factors like physical activity affect the rate of breathing and the process of breathing is different for different kinds of organisms are a part of the notes. Animals like cows, dogs, cats, and buffalo have a respiratory process similar to that of humans. The revision notes include all these and more such critical points that can be missed by students while reading the chapter.

Why are Revision Notes for Class 7 Chapter 10 - Respiration in Organisms Important?

Vedantu’s Revision Notes for Class 7 Chapter 10 - Respiration in Organisms are the finest material to understand and practice the topics in the best way.

The material carries all the information in detail and pointwise.

All the cases of the material are solved in the simplest way which explains the term clearly.

Vedantu Revision Notes for Class 7 Chapter 10 - Respiration in Organisms provides all the main topics so that the student can focus on it and prepare for the exam. 

By immersing yourself in the Class 7 Science Notes Chapter 10 - Respiration in Organisms, you not only prepare for your exams more efficiently but also develop a profound understanding of the subject matter. 

The convenience of downloading these revision notes to your smart devices empowers you to study at your own pace, making learning more flexible and accessible. Vedantu, as a dedicated platform, aims to provide students with free CBSE Solutions (NCERT) and other essential study materials. Thus, the world of knowledge is at your fingertips, with the resources you need to excel in your academic journey.

FAQs on Respiration in Organisms Class 7 Notes CBSE Science Chapter 10 (Free PDF Download)

1. What is respiration? Why do living organisms respire from CBSE Class 7 Notes Chapter 10?

Respiration is the process of breaking down food to release energy. Living organisms respire to get energy for their life processes.

2. What are the two main parts in the process of respiration from CBSE Class 7 Notes Chapter 10?

The two main parts of the process of respiration are:

External respiration: The process of taking in oxygen and giving out carbon dioxide.

Internal respiration: The process of breaking down food in the presence of oxygen to release energy.

3. What are the 2 main functions of respiration  from CBSE Class 7 Notes Chapter 10?

The two main functions of respiration are:

To release energy from food.

To remove carbon dioxide from the body.

Class 7 Science Revision Notes

Ncert solutions.