The quantity of water lost in expired air each 24 hrs is about___________?
Correct answer: B. 400 ML
- A. 200 ML
- B. 400 ML
- C. 600 ML
- D. 800 ML
Explanation
Expired air is fully humidified in the airways, causing roughly 400 mL of water loss per day in a resting adult under ordinary conditions. This loss increases with exercise, fever and dry environments.
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