Question

If alveolar ventilation is 4200 mL/min, respiratory frequency
is 12 breaths per minute, and tidal volume is 500 mL, what
is the anatomical-dead-space ventilation?

(a) 1800 mL/min (b) 6000 mL/min
(c) 350 mL/min
(d) 1200 mL/min
​

Answer 1

Answer:

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Explanation:

Total minute ventilation is comprised of dead space plus alveolar ventilation. Minute ventilation is respiratory frequency (12 breaths per minute) multiplied by tidal volume (500 mL/breath) = 6000 mL/min. Subtract from that alveolar ventilation (4200 mL/min) le., 6000 - 4200 = 1800 mL/min.