NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms

Edited By Irshad Anwar | Updated on Feb 16, 2024 06:15 PM IST

NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms: In Class 7 Science Ch 10, you will learn about respiration. It is essential for the survival of living organisms, and it helps in the release of energy from food. Respiration in Organisms Class 7 Solutions provide answers to each question in the NCERT textbook. This solution is part of NCERT Solutions for Class 7. Scroll down to go through the questions and answers given in NCERT Solutions for Class 7 Science Chapter 10.

In Class 7 Science Chapter 10 question answer, you will learn about breathing. It is a part of the process of respiration during which an organism takes in oxygen-rich air and gives out air rich in carbon dioxide. You will get questions based on these concepts in Respiration in Organisms Class 7 NCERT Solutions. If you need help finding NCERT Solutions for any other class, then don't worry; NCERT Solutions (Class 6 to 12) will help you out. Students are recommended to go through NCERT Solutions for Class 7 Science to score high marks in their examination. In the Class 7 Science Chapter 10 NCERT Solutions, you will get questions about different types of respiration and its processes.

Download PDF of NCERT Solutions for Class 7 Science Chapter 10: Respiration in Organisms

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NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms: Solved Exercise Questions:

Class 7 Science Chapter 10 Question Answer:

Q1. Why does an athlete breathe faster and deeper than usual after finishing the race?

Answer:

The muscles of an athlete undergo anaerobic respiration which means the oxygen is used up faster than being supplied by the blood.

Thus, to inhale more oxygen, an athlete breathes faster and deeper than usual after finishing the race.

Respiration in Organisms Class 7 Solutions:

Q2. List the similarities and differences between aerobic and anaerobic respiration.

Answer:

The similarities between aerobic and anaerobic respiration are:

(i) Carbon dioxide is produced in both reactions.

(ii) Energy is released in both reactions.

The differences between aerobic and anaerobic respiration are:

Aerobic	Anaerobic
Takes place in the presence of oxygen	Takes place without oxygen
Complete break down of food	Partial break down of food
Carbon dioxide and water as the end product	Ethanol, carbon dioxide as the end product(in yeast)
Produces more energy	Produces less energy

Respiration in Organisms Class 7 NCERT Solutions:

Q3. Why do we often sneeze when we inhale a lot of dust-laden air?

Answer:

Sneezing removes the foreign particle like dust particles, smoke from the air inhaled which ensures good air quality inside our body.

When we inhale, unwanted particles get trapped in the hair present in our nasal cavity. However, sometimes these particles may get past the hair causing irritation in the lining of the cavity. This causes sneezing.

Class 7 Science Chapter 10 NCERT Solutions:

Q4. Take three test-tubes. Fill ¾th 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:

We know,

Snail will inhale oxygen and exhale carbon dioxide whereas the plant will inhale carbon dioxide for respiration.

The test with snail and without plant will have maximum carbon dioxide concentration. Therefore, the order of test tube containing $CO_{2}$ is $A>C>B$ .

Hence, test-tube A will have the highest concentration of $CO_{2}$ .

Q5. Tick the correct answer:

(a) In cockroaches, air enters the body through

(i) lungs

(ii) gills

(iii) spiracles

(iv) skin

Answer:

A cockroach has small openings called spiracles on the sides of its body.

Therefore, (a) In cockroaches, air enters the body through (iii) spiracles

Class 7 Respiration in Organisms NCERT Solutions:

Q5. Tick the correct answer: (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) During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid

During heavy exercise, muscle cells respire anaerobically because oxygen is used faster as compared to its supply by the blood. The partial breakdown of glucose produces lactic acid whose accumulation causes muscle cramps.

Q5. Tick the correct answer:

(i) 9–12

(ii) 15–18

(iii) 21–24

(iv) 30–33

Answer:

Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18

This means on an average, an adult human being breathes in and out 15–18 times in a minute.

Q5. Tick the correct answer:

(d) During exhalation, the ribs

(i) move outwards

(ii) move downwards

(iii) move upwards

(iv) do not move at all

Answer:

During exhalation, the ribs (ii) move downwards

During exhalation, ribs move down and inwards reducing the size of the chest cavity causing the air to be pushed out of the lungs.

Respiration in Organisms Class 7 Questions and Answers:

Q6. Match the items in Column I with those in Column II:

Column I Column II
(a) Yeast (i) Earthworm
(b) Diaphragm (ii) Gills
(c) Skin (iii) Alcohol
(d) Leaves (iv) Chest cavity
(e) Fish (v) Stomata
(f) Frog (vi) Lungs and skin
(vii) Tracheae

Answer:

Column I	Column II
(a) Yeast	(iii) Alcohol
(b) Diaphragm	(iv) Chest cavity
(c) Skin	(i) Earthworm
(d) Leaves	(v) Stomata
(e) Fish	(ii) Gills
(f) Frog	(vi) Lungs and skin

Class 7 Science Ch 10 Question Answer:

Q7. 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) During heavy exercise the breathing rate of a person slows down. False

- During heavy exercise, we breathe faster and deeper than usual

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

- Respiration is an essential process required for the plants to live. It occurs day and night. Whereas, photosynthesis takes place only during the day.

(iii) Frogs breathe through their skins as well as their lungs. True

(iv) The fishes have lungs for respiration. False

- Fishes do not have lungs. They breathe through gills.

(v) The size of the chest cavity increases during inhalation. True

- During inhalation, ribs move up and outwards and the diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs.

Class 7th Science Chapter 10 Question Answer:

Q8. 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.

1653596907944

(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

Answer:

1653596930756

(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

NCERT Solutions for Class 7 Science Chapter 10:

Q9. 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.

(d) The pressure of air is higher than that on the ground.

Answer:

The mountaineers carry oxygen with them because the amount of oxygen availability to a person is less than that available on the ground. (b)

As we move higher in altitude, the density of the atmosphere lessens.

Respiration in Organisms Class 7 Science Chapter 10-Topics

Topics and Sub Topics in Chapter 10 Respiration in Animals and Plants:

Section	Topic Name
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?

NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms

If you are facing any issue in understanding the Class 7 Chapter 10 Science Question Answer, then don't worry and again go through that NCERT Book. Try to understand all the concepts of every topic and then write the answers of all these questions by your own. Then compare them with NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms. You will see that your knowledge, as well as the understanding of these concepts, will increase and you will be able to explain the Science Chapter 10 Class 7 Question Answer in a better way.

In Class 7 Science Chapter 10, You will study that oxygen you inhale is used to breakdown glucose into carbon dioxide along with water and in this process energy releases. This breakdown of glucose occurs in the cells of an organism, that's why it is also called cellular respiration and if the food is broken down with the help of oxygen, then it will be called aerobic respiration and without the use of oxygen, it will become anaerobic respiration. Respiration in Organisms Class 7 Solutions are the best source for students.

The Benefits of NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms:

NCERT Solutions for Chapter 10 Science Class 7th Respiration in Organisms will also boost your knowledge.
You will get all the answers to Class 7 Science Ch 10 and it will help you to score good marks in your school exam.
NCERT is the base of your learning.
NCERT Solutions for Class 7 Science Chapter 10 will also help you to understand all the concepts easily.
Class 7th Science Chapter 10 Question Answer will also help you to understand all the concepts easily.
You will get all the answers to Class 7 Science Chapter 10 and it will help you score good marks in your school exam.
Class 7th Science Chapter 10 Solutions PDF is easy to download and use offline.
The Solutions for Chapter 10 Science Class 7 are prepared by subject experts as per the latest CBSE syllabus.

NCERT Solutions for Class 7th Science: Chapter-Wise

Chapter 1	Nutrition in Plants
Chapter 2	Nutrition in Animals
Chapter 3	Fibre to Fabric
Chapter 4	Heat
Chapter 5	Acids, Bases and Salts
Chapter 6	Physical and Chemical Changes
Chapter 7	Weather, Climate and Adaptations of Animals to Climate
Chapter 8	Winds, storms and cyclones
Chapter 9	Soil
Chapter 10	Respiration in Organisms
Chapter 11	Transportation in Animals and Plants
Chapter 12	Reproduction in Plants
Chapter 13	Motion and Time
Chapter 14	Electric Current and its Effects
Chapter 15	Light
Chapter 16	Water: A Precious Resource
Chapter 17	Forests: Our Lifeline
Chapter 18	Wastewater Story

NCERT Solutions for Class 7- Subject Wise

NCERT Solutions for Class 7 Maths

NCERT Solutions for Class 7 Science

Also Check NCERT Books and NCERT Syllabus here

We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms.

Frequently Asked Questions (FAQs)

1. Is the Class 7 Science Chapter 10 Respiration in Organisms is useful in higher studies ?

Yes, this chapter is very important for higher studies in the field of science and Biology. Respiration in Organisms will be studied in NCERT Class 10 .

2. What is respiration class 7?

All living things generate the energy they need to survive through the process of respiration. Since this takes place within the cells, it is also known as cellular respiration. Normally, two gases—oxygen and carbon dioxide—are exchanged. The cells absorb oxygen and expel carbon dioxide.

3. How many questions in NCERT solutions for class 7 science chapter 10?

There are 9 questions in NCERT solution class 7 science chapter 10

Also Read

NCERT Solutions for Class 7 Science Chapter 18 Wastewater Story

NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline

NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects

NCERT Solutions for Class 7 Science Chapter 13 Motion and Time

NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

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