Which term describes air that is expired beyond tidal volume in a forceful exhalation?
a. Forced vital capacity
b. Peak expiratory flow rate
c. Tidal volume
d. Expiratory reserve
ANS: D
Expiratory reserve is the amount of air beyond tidal volume in the most forceful exhalation. Forced vital capacity is the maximum amount of air expired forcefully after maximum inspiration. Peak expiratory flow rate is the maximum flow rate of air expired during forced vital capacity. Tidal volume is the air inspired and expired in one breath.
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