mechanism of forcibal expiration
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Answer:
Contraction of internal intercostal muscles and the relaxation of diaphragm and external intercostal muscles causes a decrease in volume of the thoracic cavity. Air is therfore pushed out, down pressure gradient.
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Answer:
During forced exhalation, internal intercostal muscles which lower the rib cage and decrease thoracic volume while the abdominal muscles push up on the diaphragm which causes the thoracic cavity to contract. ... Brain control of exhalation can be broken down into voluntary control and involuntary control
Explanation:
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