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Q. No.A healthy man can inspire or expire approximately:
1. 500 mL of air per minute.
2. 2500 to 3000 mL of air per minute.
3. 1000 mL to 1100 mL per minute.
4. 6000 to 8000 mL of air per minute.
1. 500 mL of air per minute.
2. 2500 to 3000 mL of air per minute.
3. 1000 mL to 1100 mL per minute.
4. 6000 to 8000 mL of air per minute.
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory System: Pulmonary Volumes & Capacities |
 78%
From NCERT
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The conducting part of the human respiratory system is not involved in:
| I: | clearing inhaled air from foreign particles |
| II: | humidifying the exhaled air |
| III: | bringing the air to a temperature higher than body temperature |
| 1. | Only I | 2. | Only II and III |
| 3. | Only I and II | 4. | I, II and III |
Subtopic: Â Respiratory System: Upper Respiratory Tract |
 68%
From NCERT
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The figure shows the events happening during the inhalation and exhalation phases of pulmonary ventilation. Read the two given statements carefully.
| I: | A shows the inhalation phase brought about by the contraction of diaphragm that increases the volume of thorax in antero-posterior axis and by the contraction of external intercostal muscle that increases the volume of thorax in dorso-ventral axis. |
| II: | B shows the exhalation phase brought about by the relaxation of diaphragm that decreases the volume of thorax in antero-posterior axis and by the contraction of internal intercostal muscle that decreases the volume of thorax in dorso-ventral axis. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Respiratory System: Pulmonary Ventilation |
 58%
From NCERT
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Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O2 with CO2 by simple diffusion:
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
1. conducted to and from the tissues by a network of tubes.
2. over their entire body surface.
3. using their moist cuticle.
4. across the gills.
Subtopic: Â Respiratory Organs |
 89%
From NCERT
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Identify the incorrect statement regarding the enzyme carbonic anhydrase:
| 1. | RBCs contain a very high concentration of this enzyme |
| 2. | The enzyme is absent in the plasma |
| 3. | It facilitates the reaction catalyzed in both directions |
| 4. | It is a metalloenzyme |
Subtopic: Â Respiratory System: Transport of Gases |
 70%
From NCERT
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It is necessary that lungs must be present in anatomically air-tight chamber because:
| 1. | we cannot directly alter the pulmonary volume |
| 2. | our lungs are not made of any elastic tissue |
| 3. | the pleural cavity always has a positive pressure with respect to pulmonary pressure |
| 4. | the partial pressure of oxygen in atmosphere is less than that in the alveoli |
Subtopic: Â Respiratory System: Pulmonary Ventilation |
 79%
From NCERT
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| Assertion (A): | Steroids are very important in the management of bronchial asthma. |
| Reason (R): | Bronchial asthma is an inflammatory disorder. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False and (R) is True. |
Subtopic: Â Respiratory Disorders: Part 1 |
 54%
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Each haemoglobin molecule can carry a maximum of:
1. four atoms of oxygen
2. two molecules of oxygen
3. four molecules of oxygen
4. one atom of oxygen
1. four atoms of oxygen
2. two molecules of oxygen
3. four molecules of oxygen
4. one atom of oxygen
Subtopic: Â Respiratory System: Transport of Gases |
 83%
From NCERT
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Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The contraction of diaphragm brings about inhalation. |
| II: | The contraction of external intercostals bring about exhalation. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Mechanism of Breathing |
 82%
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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