السؤال 22

For quiet exhalation in the respiratory system, which statements are true? Select all that apply.

Inspiratory muscles relax.الإجابة الصحيحة
Elastic recoil helps reduce chest volume.الإجابة الصحيحة
The diaphragm contracts downward to shrink the chest.
Alveoli actively pump air out.

الشرح

When inspiratory muscles relax, elastic tissues recoil and chest volume decreases, moving air outward. A downward diaphragm contraction enlarges the chest for inhalation, so it does not explain ordinary quiet exhalation.

الشرح

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