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Q. No.During summer sleep and winter sleep in frogs, the gaseous exchange takes place:
1. Across the alveoli in the lungs.
2. Through the moist buccal mucosa.
3. In the gills.
4. Through the skin.
1. Across the alveoli in the lungs.
2. Through the moist buccal mucosa.
3. In the gills.
4. Through the skin.
Subtopic: Respiratory Organs |
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At about what partial pressure of oxygen (in mm of Hg) is the percent saturation of hemoglobin with oxygen 50% (give approximate value)?
1. 27
2. 40
3. 75
4. 100
1. 27
2. 40
3. 75
4. 100
Subtopic: Respiratory System: Transport of Gases |
58%
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Consider the two statements:
| Statement I: | The vital capacity (VC) of the lungs is equal to the sum of the tidal volume (TV), the inspiratory reserve volume (IRV), and the expiratory reserve volume (ERV). |
| Statement II: | Mathematically, FRC can be represented as: FRC = RV + ERV |
| 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: Respiratory System: Pulmonary Volumes & Capacities |
85%
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Which of the following correctly describes one of the pulmonary volumes?
| 1. | Tidal Volume (TV) is the total volume of air that can be exhaled after normal inhalation. |
| 2. | Residual Volume (RV) is the amount of air left in the lungs after a forceful exhalation. |
| 3. | Inspiratory Reserve Volume (IRV) is the volume of air inhaled during a normal breath. |
| 4. | Expiratory Reserve Volume (ERV) is the maximum volume of air that can be inhaled after a normal exhalation. |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
93%
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Emphysema and asthma both affect the lungs but differ in that:
| 1. | Asthma is characterized by excessive mucus production while emphysema involves the destruction of alveoli. |
| 2. | Emphysema is an acute response to allergens, whereas asthma is a chronic condition. |
| 3. | Asthma can be cured by medication, while emphysema is irreversible. |
| 4. | Emphysema results from allergic reactions, while asthma results from long-term exposure to pollutants. |
Subtopic: Respiratory Disorders: Part 1 |
82%
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Which of the following layers are found in the respiratory diffusion membrane?
| 1. | Capillary endothelium, alveolar epithelium, and basement membrane |
| 2. | Alveolar epithelium, alveolar macrophages, and capillary endothelium |
| 3. | Mucous layer, alveolar epithelium, and capillary endothelium |
| 4. | Basement membrane, mucous layer, and alveolar macrophages |
Subtopic: Respiratory System: Exchange of Gases |
88%
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Consider the given two statements:
| Assertion (A): | The thoracic chamber, being airtight, is critical for breathing. |
| Reason (R): | Movement of rib cage can bring about inhalation and exhalation. |
| 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 but (R) is True. |
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
From NCERT
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Consider the given two statements:
| Assertion (A): | O2 has a greater diffusing capacity than CO2 across the respiratory diffusion membrane. |
| Reason (R): | O2 is more soluble in water than CO2. |
| 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. | Both (A) and (R) are False |
Subtopic: Respiratory System: Exchange of Gases |
89%
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What does a right shift in the oxygen dissociation curve of hemoglobin indicate about the physiological conditions?
| 1. | Decreased oxygen affinity, indicating conditions such as a lower pH, a higher temperature, or increased levels of CO2. |
| 2. | Increased oxygen affinity, indicating conditions such as a higher pH, a lower temperature, or decreased levels of CO2. |
| 3. | Decreased temperature and CO2 levels, leading to a reduced ability of hemoglobin to release oxygen to tissues. |
| 4. | Increased hemoglobin saturation with oxygen at lower partial pressures, indicating hyperventilation. |
Subtopic: Respiratory System: Transport of Gases |
84%
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Peripheral chemoreceptors for regulation of respiration are located:
1. In the aorta and the carotid artery
2. In the medulla oblongata
3. In the pons
4. In the alveoli
1. In the aorta and the carotid artery
2. In the medulla oblongata
3. In the pons
4. In the alveoli
Subtopic: Respiratory System: Regulation of Respiration |
67%
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