Which of the Following Is True Regarding Normal Quiet Expiration

question 55

Multiple Choice

Which of the following is true regarding normal quiet expiration of air?

• A) It depends on the complete lack of surface tension on the alveolar wall.
• B) It is a passive process that depends on the recoil of elastic fibers that were stretched during inspiration.
• C) It requires contraction of abdominal wall muscles.
• D) It is driven by increased blood CO₂ levels.

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