Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls?
1. Hypocapnia
2. Bronchitis
3. Asthma
4. Emphysema

Subtopic:  Respiratory Disorders: Part 1 |
 89%
From NCERT
NEET - 2022
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In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to: 
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)

Subtopic:  Respiratory System: Regulation of Respiration |
 79%
From NCERT
NEET - 2022
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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
(c) The maximum volume of air a person can breathe in after forced expiration
(d) It includes ERV, RV and IRV.
(e) The maximum volume of air a person can breathe out after a forced inspiration.

Choose the most appropriate answer from the options given below:
1. (b), (d) and (e)
2. (a), (c) and (d)
3. (a), (c) and (e)
4. (a) and (e)
Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 73%
From NCERT
NEET - 2022
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Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.
1. Medulla 2. Pons
3. Thalamus 4. Cerebrum
Subtopic:  Respiratory System: Regulation of Respiration |
 84%
From NCERT
NEET - 2022
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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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Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver  _____________ml of O2 to the tissues.
1. 10 ml
2. 2 ml 
3. 5 ml
4. 4 ml

Subtopic:  Respiratory System: Transport of Gases |
 85%
From NCERT
NEET - 2022
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Vital capacity of lung is
1. IRV + ERV + TV 2. IRV + ERV 
3. IRV + ERV + TV + RV 4. IRV + ERV + TV - RV
Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 79%
From NCERT
NEET - 2023
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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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Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli. 

1. High pO2, high pCO2, less H+, higher temperature

2. Low pO2, low pCO2, more H+, higher temperature

3. High pO2, low pCO2, less H+, lower temperature

4. Low pO2 high pCO2 more H+, higher temperature

Subtopic:  Respiratory System: Transport of Gases |
 89%
From NCERT
NEET - 2021
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Transport of gases in alveoli takes place by:

1. Active transport 2. Passive transport
3. Simple diffusion 4. None of the above
Subtopic:  Respiratory System: Exchange of Gases |
 86%
From NCERT
AIPMT - 1998
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