Q. No.A minimal amount of pleural fluid present in the pleural cavity:
1.
provides a medium for the exchange of respiratory gases
2.
reduces friction between the visceral and parietal pleurae
3.
provides lubrication for movements of the diaphragm
4.
permits the exchange of electrolytes during respiration
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When the diaphragm or external intercostal muscles contract, intrapulmonary pressure should
| 1. | increase | 2. | decrease |
| 3. | remain constant | 4. | equal atmospheric pressure |
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During deglutition, the food is prevented from entering into the larynx by the cartilaginous:
| 1. epiglottis | 2. glottis |
| 3. aryepiglottic fold | 4. laryngeal prominence |
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Alveoli in the lungs are lined by:
1. a simple squamous epithelium.
2. a pseudostratified ciliated columnar epithelium.
3. a simple cuboidal epithelium.
4. a transitional epithelium.
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| Assertion (A): | Oxidized hemoglobin carries maximum oxygen in the human blood. |
| Reason (R): | Oxidized hemoglobin has more affinity for oxygen than deoxygenated hemoglobin. |
In the light of the above statements choose the correct answer from the options given below:
| 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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | The Bohr effect enables the body to adapt to changing conditions and makes it possible to supply extra oxygen to tissues that need it the most. |
| Reason (R): | A lower pH in strenuously metabolizing tissues promotes the dissociation of oxygen from haemoglobin, and allows the surrounding tissues to obtain enough oxygen to meet their demands. |
In the light of the above statements choose the correct answer from the options given below:
| 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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Corticosteroids are very effective in the management of bronchial asthma. |
| Reason (R): | Corticosteroids are potent anti-inflammatory agents. |
In the light of the above statements choose the correct answer from the options given below:
| 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. |
Most of the aquatic arthropods respire through:
| 1. diffusion over entire body surface | 2. gills |
| 3. tracheae and tracheoles | 4. skin |
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The trachea divides into a right and a left primary bronchus at the level of:
| 1. 2nd thoracic vertebra | 2. 3rd thoracic vertebra |
| 3. 5th thoracic vertebra | 4. 12th thoracic vertebra |
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Consider the following two statements:
| I: | The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber. |
| II: | This arrangement is essential as we cannot directly alter the thoracic volume. |
| 1. | Both I and II are correct and II correctly explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct and II is incorrect |
| 4. | Both I and II are incorrect |
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