Energy expenditure during normal breathing____________?
Correct answer: A. 2% - 3% of total energy spent
- A. 2% - 3% of total energy spent
- B. 50% -75% of total energy spent
- C. 15% - 20% of total energy spent
- D. 25% - 50% of total energy spent
Explanation
Quiet breathing normally requires only about 2–3% of total body energy expenditure because lung and chest-wall resistance are low. The much higher percentages represent abnormal increases in the work of breathing.
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