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Q. No.Volume of air that will remain in the lungs after a normal expiration averages:
1. 1000 mL to 1100 mL.
2. 2100 mL to 2300 mL.
3. 1100 mL to 1200 mL.
4. 2500 mL to 3000 mL.
Subtopic: Â Respiratory System: Pulmonary Volumes & Capacities |
From NCERT
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | The partial pressure of oxygen is equal in alveoli and oxygenated blood. |
| Statement II: | The partial pressure of carbon dioxide is equal in alveoli and deoxygenated blood. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Respiratory System: Exchange of Gases |
 73%
From NCERT
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Consider the given two statements:
| Assertion (A): | O2 gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. |
| Reason (R): | In the alveoli, there is high pO2, low pCO2, lesser H+ concentration and lower temperature whereas in the tissues, low pO2, high pCO2, high H+ concentration and higher temperature exist. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Â Respiratory System: Pulmonary Ventilation |Â Respiratory System: Exchange of Gases |Â Respiratory System: Regulation of Respiration |
 86%
From NCERT
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At about what partial pressure of oxygen [mm Hg] is the haemoglobin in blood 50% saturated?
| 1. | 95 | 2. | 75 |
| 3. | 27 | 4. | 15 |
Subtopic: Â Respiratory System: Transport of Gases |
From NCERT
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In tissues:
1. a and b are correct
2. a and d are correct
3. b and c are correct
4. c and d are correct
| a. | pCO2 is high and pO2 is low |
| b. | dissociation of CO2 from carbamino-haemoglobin takes place |
| c. | pCO2 is low and pO2 is high |
| d. | more binding of carbon dioxide to haemoglobin occurs |
1. a and b are correct
2. a and d are correct
3. b and c are correct
4. c and d are correct
Subtopic: Â Respiratory System: Exchange of Gases |
 84%
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Regarding the chemical regulation of respiration in humans:
1. Only I and II are correct
2. Only II and III are incorrect
3. I, II and III are incorrect
4. Only I and III are correct
| I: | A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO2 and hydrogen ions. |
| II: | Receptors associated with aortic arch and carotid artery can recognise changes in O2 concentration and send necessary signals to the rhythm centre for remedial actions. |
| III: | The role of oxygen in the regulation of respiratory rhythm is most significant. |
2. Only II and III are incorrect
3. I, II and III are incorrect
4. Only I and III are correct
Subtopic: Â Respiratory System: Exchange of Gases |Â Respiratory System: Regulation of Respiration |
 59%
From NCERT
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A chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased will be:
| 1. | Emphysema | 2. | Asthma |
| 3. | Tuberculosis | 4. | Common cold |
Subtopic: Â Respiratory Disorders - III |
 92%
From NCERT
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The lungs are covered by the pleural membranes which mainly help in:
1. maintaining pressure
2. increasing thoracic pressure
3. removing foreign particles
4. reducing friction
1. maintaining pressure
2. increasing thoracic pressure
3. removing foreign particles
4. reducing friction
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory Organs |
 88%
From NCERT
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Consider the two statements:
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
| Statement I: | The alveoli have ciliated cells in them to help expel dust particles that make it this far down into the respiratory tract. |
| Statement II: | Gas exchange between the lungs and the blood, and between the blood and tissue fluid, is an active transport process. |
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |
 55%
From NCERT
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Consider the two statements:
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
| Statement I: | Intrapulmonary pressure must be greater than atmospheric pressure for air to enter the lungs. |
| Statement II: | Intrapulmonary pressure must be lower than atmospheric pressure for air to be exhaled out of the lungs. |
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic: Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
 89%
From NCERT
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