- 1(current)
Q. No.The conducting part of the human respiratory system:
1. Only I and II are correct
2. Only II and IV are correct
3. Only I, II and III are correct
4. Only II, III and IV are correct
| I: | transports the atmospheric air to the alveoli |
| II: | clears inhaled air from foreign particles |
| III: | humidifies and also brings the air to body temperature |
| IV: | is the site of actual diffusion of O2 and CO2 between blood and atmospheric air |
2. Only II and IV are correct
3. Only I, II and III are correct
4. Only II, III and IV are correct
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung | Respiratory System: Regulation of Respiration | Respiratory Organs |
91%
Level 1: 80%+
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Regarding pulmonary circulation in humans:
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: | Oxygen rich blood returns from the lungs to the heart through the pulmonary arteries. |
| II: | Oxygen poor blood leaves the heart and goes to the lungs through the pulmonary veins. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung | Respiratory System: Pulmonary Volumes & Capacities | Respiratory System: Exchange of Gases | Respiratory System: Regulation of Respiration |
80%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | The amount of CO2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much lower compared to that of O2. |
| Reason (R): | The solubility of CO2 is 20-25 times higher than that of O2. |
| 1. | Both (A) and (R) are True and the (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but the (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Respiratory System: Exchange of Gases | Respiratory System: Regulation of Respiration |
72%
Level 2: 60%+
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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 respiratory rhythm centre is located in the medulla oblongata. |
| Statement II: | Pneumotaxic centre is located in the pons. |
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: Respiratory System: Regulation of Respiration |
94%
Level 1: 80%+
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How many of the given statements are correct?
1. 1
2. 2
3. 3
4. 4
| I: | Medulla region of the brain is the location of respiratory rhythm centre. |
| II: | Pneumotaxic centre is located in hypothalamus. |
| III: | A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO2 and hydrogen ions. |
| IV: | Receptors associated with aortic arch and carotid artery respond only to change in partial pressure of oxygen. |
2. 2
3. 3
4. 4
Subtopic: Respiratory System: Regulation of Respiration |
75%
Level 2: 60%+
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Chemosensitive area situated adjacent to the rhythm center is highly sensitive to
A: Carbon dioxide
B: Oxygen
C: Hydrogen ions
1. Only A and B
2. Only A and C
3. Only B and C
4. A, B and C
A: Carbon dioxide
B: Oxygen
C: Hydrogen ions
1. Only A and B
2. Only A and C
3. Only B and C
4. A, B and C
Subtopic: Respiratory System: Regulation of Respiration |
89%
Level 1: 80%+
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Which of the following statements is not correct?
| 1. | Every 100 ml of oxygenated blood can deliver around 5 ml of oxygen to the tissue under normal physiological conditions. |
| 2. | Oxygen gas has most potent effect on the central chemoreceptors and plays most vital role in regulation of respiration |
| 3. | Nearly 70 percent of carbon dioxide is carried as bicarbonate in the blood. |
| 4. | Every 100 ml of deoxygenated blood delivers about 4 ml of carbon dioxide to the alveoli. |
Subtopic: Respiratory System: Regulation of Respiration |
88%
Level 1: 80%+
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Which of the following statements accurately describe the roles of different centres and receptors in regulating respiration in humans?
How many of the above statements are correct?
1. Only two
2. Only three
3. All four
4. Only one
| A. | The pneumotaxic centre in the pons sends signals that reduce the duration of inspiration, thus increasing the breathing rate. |
| B. | The chemosensitive area near the medullary rhythm centre plays a dominant role in detecting rising CO₂ and H⁺ levels in the blood. |
| C. | Receptors in the aortic arch and carotid artery primarily respond to changes in O₂ levels and increase the breathing rate when oxygen falls. |
| D. | The role of O₂ in regulating respiratory rhythm under normal physiological conditions is negligible compared to CO₂ and H⁺. |
1. Only two
2. Only three
3. All four
4. Only one
Subtopic: Respiratory System: Regulation of Respiration |
80%
Level 1: 80%+
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- 1(current)
Q. No.
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