PHYSIOLOGY
PULMONARY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contraction of the diaphragm causes a decrease or increase in pressure in the alveoli from ____ to ____
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decrease
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increase
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760 to 758
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758 to 760
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Explanation:
Detailed explanation-1: -During inspiration, the contraction of diaphragm occurs and it become flat. This increase the volume of the thoracic cavity in the longitudinal direction i.e., antero-posterior axis.
Detailed explanation-2: -Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.
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