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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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Regarding pulmonary volumes and capacities, which of the following will not hold true?
1. TLC – VC = RV
2. TLC – RV = FRC
3. IC = VC - ERV
4. ERV + RV = FRC
1. TLC – VC = RV
2. TLC – RV = FRC
3. IC = VC - ERV
4. ERV + RV = FRC
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
66%
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 |
61%
From NCERT
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Vital capacity can be defined as:
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 maximum volume of air a person can breathe in after a normal expiration. |
| II: | The maximum volume of air a person can breathe out after a normal inspiration. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
59%
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 |
89%
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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CO2 is carried by haemoglobin as:
1. carbamino-haemoglobin
2. carboxy-haemoglobin
3. deoxy-haemoglobin
4. oxidised haemoglobin
1. carbamino-haemoglobin
2. carboxy-haemoglobin
3. deoxy-haemoglobin
4. oxidised haemoglobin
Subtopic: Respiratory System: Transport of Gases |
89%
From NCERT
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Identify the incorrect statement regarding carbonic anhydrase:
| 1. | RBCs contain a very high concentration of the enzyme. |
| 2. | It is not present at all in the plasma. |
| 3. | It assists rapid inter-conversion of carbon dioxide and water into carbonic acid, protons and bicarbonate ions. |
| 4. | The active site of the enzyme contains a zinc ion. |
Subtopic: Respiratory System: Transport of Gases |
80%
From NCERT
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