Select the sequence of steps in respiration.
(A) Diffusion of gases (O2 and CO2) across alveolar membrane.
(B) Diffusion of O2 and CO2 between blood and tissues
(C) Transport of gases by the blood
(D) Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
(E) Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2

Choose the correct answer from the options given below:
1. (D), (A), (C), (B), (E) 2. (C), (B), (A), (E), (D)
3. (B), (C), (E), (D), (A) 4. (A), (C), (B), (E), (D)
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 78%
From NCERT
NEET - 2023
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Which of the following is not the function of conducting part of respiratory system?
1. Provides surface for diffusion of O2 and CO2
2. It clears inhaled air from foreign particles
3. Inhaled air is humidified
4. Temperature of inhaled air is brought to body temperature
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 84%
From NCERT
NEET - 2022
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Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because?

1. there is a negative pressure in the lungs
2. there is a negative intrapleural pressure pulling at the lung walls
3. there is a positive intrapleural pressure
4. pressure in the lungs is higher than the atmospheric pressure

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 59%
From NCERT
NEET - 2016
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The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:

1. B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing.
2. C-alveoli-thin walled vascular bag-like structures for the exchange of gases.
3. D-lower end of the lungs-diaphragm pulls it down during inspiration.
4. A trachea-long tube supported by complete cartilaginous rings for conducting inspired air.

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 76%
From NCERT
AIPMT - 2013
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Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:

1. diaphragm 2. neck
3. tongue 4. epiglottis
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 95%
From NCERT
AIPMT - 2011
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