MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which properly describes inhalation?
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ribs go down and out
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lung pressure is low causing air to rush in
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lung pressure is high causing air to rush in
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volume is low
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Explanation:
Detailed explanation-1: -Expansion of the thoracic cavity also causes the lungs to expand, due to the adhesiveness of the pleural fluid. As a result, the pressure within the lungs drops below that of the atmosphere, causing air to rush into the lungs. In contrast, expiration is a passive process.
Detailed explanation-2: -Intraalveolar pressure is the pressure inside the alveoli of the lungs.
Detailed explanation-3: -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.
There is 1 question to complete.