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Question 22

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

  1. Inspiratory muscles relax.Correct answer
  2. Elastic recoil helps reduce chest volume.Correct answer
  3. The diaphragm contracts downward to shrink the chest.
  4. Alveoli actively pump air out.

Explanation

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.

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Question 22: For quiet exhalation in the respiratory system, which… · Human Body Systems · Questena