- 1(current)
Q. No.Consider the following statements:
I. The thoracic chamber is anatomically an air tight chamber.
II. Any change in the volume of the thoracic cavity will be reflected in the pulmonary cavity.
1. Both I and II are correct and II explains I
2. Both I and II are correct and I explains II
3. Both I and II are correct but II does not explain I
4. Both I and II are incorrect
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The basic rhythm of breathing is controlled by:
1. peripheral chemoreceptors
2. dorsal respiratory group of the medullary rhythmicity center
3. ventral respiratory group of the medullary rhythmicity center
4. pneumotaxic area
Under normal resting conditions, almost all respiratory effort is due to:
1. contraction and relaxation of diaphragm
2. elevation of rib cage
3. depression of rib cage
4. contraction of abdominal muscles
The most negative pressure at the end of normal inspiration would be:
| 1. alveolar | 2. tracheal |
| 3. partial | 4. pleural |
Which of the following will bring about inhalation in human beings?
I. Contraction of diaphragm
II. Contraction of internal intercostals
III. Contraction of external intercostals
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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- 1(current)
Q. No.
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