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Q. No.On an average, a healthy human breathes:
1. 4-8 times/minute.
2. 8-12 times/minute.
3. 12-16 times/minute.
4.16-20 times/minute.
Subtopic: Respiratory System: Pulmonary Ventilation |
96%
From NCERT
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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.
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: Respiratory System: Pulmonary Volumes & Capacities |
From NCERT
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Consider the 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: | Expiratory Capacity is the total volume of air a person can expire after a normal inspiration. |
| Statement II: | Functional Residual Capacity is the volume of air that will remain in the lungs after a forceful maximal expiration. |
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: Respiratory System: Pulmonary Volumes & Capacities |
60%
From NCERT
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O2 and CO2 are exchanged by simple diffusion:
I: at alveoli
II: between blood and tissues
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: at alveoli
II: between blood and tissues
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: Respiratory System: Exchange of Gases |
88%
From NCERT
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The partial pressure of CO2 in deoxygenated blood and tissues is about:
1. 40 mm Hg
2. 45 mm Hg
3. 100 mm Hg
4. 104 mm Hg
1. 40 mm Hg
2. 45 mm Hg
3. 100 mm Hg
4. 104 mm Hg
Subtopic: Respiratory System: Exchange of Gases |
88%
From NCERT
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The correct sequence of the magnitude of the partial pressure of oxygen [beginning at the maximum] will be:
| 1. | Atmospheric air → Oxygenated blood → Alveoli → Tissues |
| 2. | Alveoli → Atmospheric air → Oxygenated blood → Tissues |
| 3. | Atmospheric air → Alveoli → Oxygenated blood → Tissues |
| 4. | Alveoli → Atmospheric air → Oxygenated blood → Deoxygenated blood |
Subtopic: Respiratory System: Exchange of Gases |
88%
From NCERT
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The diffusion [respiratory] membrane in humans is composed of all the following layers except:
1. Squamous epithelium of alveoli
2. Endothelium of alveolar capillaries
3. Podocytes of the inner alveolar surface
4. Basement substance
1. Squamous epithelium of alveoli
2. Endothelium of alveolar capillaries
3. Podocytes of the inner alveolar surface
4. Basement substance
Subtopic: Respiratory System: Exchange of Gases |
92%
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: | Each haemoglobin molecule can carry a maximum of four molecules of O2. |
| Statement II: | Hemoglobin can bind to four molecules of CO2. |
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: Respiratory System: Transport of Gases |
From NCERT
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The shape of the oxygen dissociation curve is:
1. a rectangular hyperbola
2. sigmoid
3. ellipse
4. parabola
1. a rectangular hyperbola
2. sigmoid
3. ellipse
4. parabola
Subtopic: Respiratory System: Transport of Gases |
96%
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
1. 95
2. 75
3. 27
4. 15
Subtopic: Respiratory System: Transport of Gases |
From NCERT
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