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Breathing and Exchange of Gases — NEET UG Zoology PYQs

439 previous year questions from Breathing and Exchange of Gases with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

439 questionsZoologySolutions on every page
1

Match List I with List II : List I (Respiratory Volume) List II (Capacity in mL) A. ERV (Expiratory Reserve Volume) I. 2500 - 3000 mL B. RV (Residual Volume) II. 500 mL C. IRV (Ins

NEET 2026 Solution View → 2

In humans, respiration occurs in the following steps. Arrange these steps in the correct order. A. Diffusion of O ₂ and CO ₂ between blood and tissues. B. Diffusion of O ₂ and CO ₂

NEET 2026 Solution View → 3

Sponges exchange O₂ with CO₂ by __________.

NEET 2026 Solution View → 4

In water, frogs respire using __________.

NEET 2026 Solution View → 5

Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following :

NEET 2025 Solution View → 6

Match List-I with List-II. array |l|l|l|l| & List - I & & List - II A . & Emphysema & (i) & Rapid spasms in muscle due to low Ca ⁺⁺ in body fluid B. & Angina pectoris & (ii) & Dama

NEET 2025 Solution View → 7

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: During the transportation of gases, about 20-25 percent of CO ₂ i

NEET 2024 Solution View → 8

Match List I with List II : Choose the correct answer from the options given below :

NEET 2024 Solution View → 9

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

NEET 2024 Solution View → 10

Match List-I with List-II: array |l|l|r|l| & List-I & & List-II A. & Residual Volume & I. & array l Maximum volume of air that can be breathed in after forced expiration array B. &

NEET 2024 Solution View → 11

Vital capacity of lung is ______ .

NEET 2023 Solution View → 12

Select the sequence of steps in Respiration. (A) Diffusion of gases ( O ₂ . and . CO ₂ ) across alveolar membrane. (B) Diffusion of O ₂ and CO ₂ between blood and tissues. (C) Tran

NEET 2023 Solution View → 13

Which of the following statements are correct with respect to vital capacity? (a) It includes ERV, TV and IRV (b) Total volume of air a person can inspire after a normal expiration

NEET 2022 Solution View → 14

Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.

NEET 2022 Solution View → 15

Under normal physiological conditions in human being every 100   ml of oxygenated blood can deliver ___________ ml of O 2 to the tissues.

NEET 2022 Solution View → 16

Which of the following is not the function of conducting part of respiratory system?

NEET 2022 Solution View → 17

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

NEET 2021 Solution View → 18

The partial pressures (in mmHg ) of oxygen O 2 and carbon dioxide CO 2 at alveoli (the site of diffusion) are:

NEET 2021 Solution View → 19

The Total Lung Capacity ( TLC ) is the total volume of air accomodated in the lungs at the end of a forced inspiration. This includes:

NEET 2020 Solution View → 20

Match the following columns and select the correct option:- Column-I Column-II (a) Pneumotaxic centre (i) Alveoli (b) O 2 Dissociation curve (ii) Pons region of brain (c) Carbonic

NEET 2020 Solution View → 21

Select the correct events that occur during inspiration. (a) Contraction of diaphragm (b) Contraction of external intercostal muscles (c) Pulmonary volume decreases (d) Intrapulmon

NEET 2020 Solution View → 22

Identify the wrong statement with reference to transport of oxygen.

NEET 2020 Solution View → 23

Assertion : If two men expire the same volume of air after normal inspiration, they have the same expiratory capacity. Reason : Expiratory capacity includes tidal volume and inspir

AIIMS 2019 Solution View → 24

Select the correct statement.

NEET 2019 Solution View → 25

Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

NEET 2019 Solution View → 26

The maximum volume of air a person can breathe in after a forced expiration is known as

NEET 2019 Solution View → 27

Assertion : The dorsal respiratory group (DRG) present in the dorsal portion of medulla oblongata mainly causes expiration. Reason : The ventral respiratory group (VRG) on the vent

AIIMS 2018 Solution View → 28

The ventilation movements of the lungs in mammals are governed by

AIIMS 2018 Solution View → 29

Match the items given in Column I with those in Column II and select the correct option given below: Column - I Column - II a. Tidal volume i. 2500 - 3000 mL b. Inspiratory Reserve

NEET 2018 Solution View → 30

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?

NEET 2018 Solution View → 31

Which of the following is an occupational respiratory disorder?

NEET 2018 Solution View → 32

Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:

NEET 2017 Solution View → 33

The volume of 'anatomical dead space' air is normally

AIIMS 2016 Solution View → 34

The partial pressure of oxygen in the alveoli of the lungs is:

NEET 2016 Solution View → 35

Lungs does not collapse between breaths and some amount of air will always remain in the lungs which can never be expelled because,

NEET 2016 Solution View → 36

After forceful inspiration, the amount of air that can be breathed out with maximum forced expiration is equal to

NEET 2016 Solution View → 37

Asthma may be attributed to:

NEET 2016 Solution View → 38

Reduction in pH of blood will:

NEET 2016 Solution View → 39

Hiccups can be best described as

AIIMS 2015 Solution View → 40

Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.

NEET 2015 Solution View → 41

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?

NEET 2015 Solution View → 42

Assertion : Smoking causes oxygen deficiency in the body. Reason: Carbon monoxide when inhaled while smoking, combines with haemoglobin to form chemically stable compound.

AIIMS 2014 Solution View → 43

Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs:

NEET 2014 Solution View → 44

Carbon dioxide ( CO ₂ ) diffuses into blood from tissue site and passes to alveolar site in the form of

AIIMS 2013 Solution View → 45

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D . Select the option, which gives correct identification and main function and/or characte

NEET 2013 Solution View → 46

Oxygen binding to haemoglobin in blood is

AIIMS 2012 Solution View → 47

Assertion : Extra oxygen consumption in human body is known as oxygen debt. Reason : The extra oxygen is required by the body to oxidise the accumulated lactic acid produced during

AIIMS 2012 Solution View → 48

Which one of the following is the correct statement for respiration in humans?

NEET 2012 Solution View → 49

A large proportion of oxygen is left unsused in the human blood even after its uptake by the body tissues. This O ₂

NEET 2011 Solution View → 50

The figure given below shows a small part of human lung where exchange of gas takes place. In which one of the options given below, the one part A, B C or D is correctly identified

NEET 2011 Solution View → 51

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

NEET 2011 Solution View → 52

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

NEET 2011 Solution View → 53

Chemosensitive area of respiratory centre in medulla is affected by

AIIMS 2010 Solution View → 54

Assertion : Emphysema is a chronic disorder in which alveolar walls are damaged. Reason : Emphysema is closely related to cigarette smoking.

AIIMS 2010 Solution View → 55

Which two of the following changes (1-4) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 ~m or more)? (1) Increase in red blood cell size (2) In

NEET 2010 Solution View → 56

Listed below are four respiratory capacities (1 - 4) and four jumbled respiratory volumes of a normal human adult (1) Residual volume 2500 ~mL (2) Vital capacity 3500 ~mL (3) Inspi

NEET 2010 Solution View → 57

Assertion : Ciliated epithelium is present in the inner lining of trachea and large bronchi. Reason : Ciliary movement propel the mucus and foreign particle towards the larynx.

AIIMS 2008 Solution View → 58

When a man inhales air containing normal concentration of ( O ₂ ) as well as ( CO ) he suffers from suffocation because

AIIMS 2008 Solution View → 59

What is vital capacity of our lungs?

NEET 2008 Solution View → 60

The haemoglobin of a human foetus

NEET 2008 Solution View → 61

Which one of the following item gives its correct total number?

NEET 2008 Solution View → 62

What is vital capacity of our lungs?

NEET 2008 Solution View → 63

The haemoglobin of a human foetus

NEET 2008 Solution View → 64

Which of the following match is correct?

AIIMS 2007 Solution View → 65

The majority of carbon dioxide produced by our body cells is transported to the lungs:

NEET 2006 Solution View → 66

Which one of the following statements is incorrect?

NEET 2006 Solution View → 67

When CO ₂ concentration in blood increases breathing becomes:

NEET 2004 Solution View → 68

Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been

NEET 2004 Solution View → 69

All veins carry deoxygenated blood except

AIIMS 2001 Solution View → 70

The respiratory centre in the brain is stimulated by

AIIMS 2001 Solution View → 71

What is the purpose of respiration in organisms?

NEET Solution View → 72

What is the source of O₂ in respiration?

NEET Solution View → 73

What is the byproduct of respiration in organisms?

NEET Solution View → 74

How is the process of respiration performed in organisms?

NEET Solution View → 75

Can you feel the breathing process in organisms?

NEET Solution View → 76

How do sponges exchange O₂ and CO₂?

NEET Solution View → 77

How do insects transport atmospheric air within their bodies?

NEET Solution View → 78

How do earthworms exchange O₂ and CO₂?

NEET Solution View → 79

Do mechanisms of breathing vary among different groups of animals?

NEET Solution View → 80

What is the mechanism of breathing for sponges?

NEET Solution View → 81

How do sponges exchange oxygen and carbon dioxide?

NEET Solution View → 82

What type of respiratory structures are used by most aquatic arthropods and molluscs?

NEET Solution View → 83

How do reptiles, birds, and mammals respire?

NEET Solution View → 84

What type of respiratory system do mammals have?

NEET Solution View → 85

Can amphibians respire through their moist skin?

NEET Solution View → 86

What is the function of the larynx in the human respiratory system?

NEET Solution View → 87

What is the role of the epiglottis in the human respiratory system?

NEET Solution View → 88

What is the common passage for food and air in the human respiratory system?

NEET Solution View → 89

Where do the external nostrils lead to in the human respiratory system?

NEET Solution View → 90

What are the bag-like structures in the lungs called?

NEET Solution View → 91

What is the purpose of pleural fluid between the two lungs?

NEET Solution View → 92

Which pleural membrane is in close contact with the thoracic lining?

NEET Solution View → 93

What is the inner pleural membrane in contact with?

NEET Solution View → 94

What is the main function of the conducting part of the respiratory system?

NEET Solution View → 95

Where does the actual diffusion of O₂ and CO₂ take place in the respiratory system?

NEET Solution View → 96

What is the function of pleural fluid in the respiratory system?

NEET Solution View → 97

What is the difference between the outer and inner pleural membrane in the respiratory system?

NEET Solution View → 98

What is the main difference between the conducting and exchange parts of the respiratory system?

NEET Solution View → 99

What is the function of the thoracic chamber in relation to the lungs?

NEET Solution View → 100

What are the borders of the thoracic chamber?

NEET Solution View → 101

What is the main function of the anatomical setup of the lungs in the thorax?

NEET Solution View → 102

What is the purpose of the pleural fluid in the lungs?

NEET Solution View → 103

What is the first step in the process of respiration?

NEET Solution View → 104

Which of the following does not occur during respiration?

NEET Solution View → 105

What occurs during the third step of respiration?

NEET Solution View → 106

What is the main process that enables breathing?

NEET Solution View → 107

What is the requirement for inspiration to occur?

NEET Solution View → 108

What is the main reason for expiration to occur?

NEET Solution View → 109

What happens when the intra-pulmonary pressure is equal to atmospheric pressure?

NEET Solution View → 110

What is the requirement for expiration to take place?

NEET Solution View → 111

What helps in generating gradients for inspiration?

NEET Solution View → 112

What initiates inspiration?

NEET Solution View → 113

What is the role of external intercostal muscles in inspiration?

NEET Solution View → 114

What is the effect of the contraction of diaphragm on the thoracic chamber?

NEET Solution View → 115

What is the relationship between the contraction of external intercostal muscles and the volume of the thoracic chamber?

NEET Solution View → 116

What causes an increase in pulmonary volume?

NEET Solution View → 117

What happens to the intra-pulmonary pressure when the pulmonary volume increases?

NEET Solution View → 118

What forces air from outside to move into the lungs?

NEET Solution View → 119

What returns the diaphragm and sternum to their normal positions?

NEET Solution View → 120

What happens to the thoracic and pulmonary volumes when the diaphragm and intercostal muscles relax?

NEET Solution View →
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