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NEET Breathing and Exchange of Gases PYQs with Solutions

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

439 questionsZoology2001–2026Answers + solutions

About Breathing and Exchange of Gases PYQs

Breathing and Exchange of Gases has 439 previous year questions in the Quantrex Academy NEET UG Zoology bank. The 220 questions in this list come from NEET (204) and AIIMS (16), spanning 2001 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Breathing and Exchange of Gases PYQs with Solutions

About Breathing and Exchange of Gases PYQs

Questions by year (this list)

Breathing and Exchange of Gases questions with solutions

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

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

Sponges exchange O _2 with CO _2 by __________.

In water, frogs respire using __________.

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 :

Match List-I with List-II. List - I List - II A. Emphysema (i) Rapid spasms in muscle due to low Ca^ ++ in body fluid B. Angina pectoris (ii) Damaged alveolar walls and decreased

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

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

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

Match List-I with List-II: List-I List-II A. Residual Volume I. Maximum volume of air that can be breathed in after forced expiration B. Vital Capacity II. Volume of air inspired

Vital capacity of lung is ______ .

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)

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

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

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

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

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

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

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

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)

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

Identify the wrong statement with reference to transport of oxygen.

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

Select the correct statement.

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?

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

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

The ventilation movements of the lungs in mammals are governed by

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

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

Which of the following is an occupational respiratory disorder?

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

The volume of 'anatomical dead space' air is normally

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

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

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

Asthma may be attributed to:

Reduction in pH of blood will:

Hiccups can be best described as

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

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

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

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

Carbon dioxide (CO_2) diffuses into blood from tissue site and passes to alveolar site in the form of

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

Oxygen binding to haemoglobin in blood is

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

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

A large proportion of oxygen is left unsused in the human blood even after its uptake by the body tissues. This O_2

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

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

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

Chemosensitive area of respiratory centre in medulla is affected by

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

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)

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)

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.

When a man inhales air containing normal concentration of \(O_2\) as well as \(CO\) he suffers from suffocation because

What is vital capacity of our lungs?

The haemoglobin of a human foetus

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

What is vital capacity of our lungs?

The haemoglobin of a human foetus

Which of the following match is correct?

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

Which one of the following statements is incorrect?

When CO_2 concentration in blood increases breathing becomes:

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

All veins carry deoxygenated blood except

The respiratory centre in the brain is stimulated by

What is the purpose of respiration in organisms?

What is the source of O₂ in respiration?

What is the byproduct of respiration in organisms?

How is the process of respiration performed in organisms?

Can you feel the breathing process in organisms?

How do sponges exchange O₂ and CO₂?