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Tidal volume of air in a normal healthy man during inspiration is about

1. 300-400ml
2. 500-700ml
3. \( 900-1000 \mathrm{ml} \)
4. 100-250ml

Correct answer: 500-700ml

Solution

Tidal volume is the amount of air moved in or out during a normal quiet breath. In a healthy adult, this is about 500 mL, which matches the 500–700 mL range best.

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