A person has tidal volume 500 cm³, anatomical dead space 150 cm³ and a breathing rate of 12 per minute. What is the alveolar ventilation?
Correct answer B. 4200 cm³ per minute
Explanation
Only air beyond the dead space reaches the alveoli. Alveolar ventilation = (500 − 150) × 12 = 350 × 12 = 4200 cm³ per minute.
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