The nurse is reviewing the results of a patient's pulmonary function tests. Which result describes the air remaining in lungs after normal expiration?
a. Tidal volume
b. Expiratory reserve
c. Forced vital capacity
d. Functional residual capacity
ANS: D
Functional residual capacity is the air remaining in lungs after normal expiration. C. Forced vital capacity is the maximum amount of air expired forcefully after maximum inspiration. B. Expiratory reserve is the amount of air beyond tidal volume in the most forceful exhalation. A. Tidal volume is the air inspired and expired in one breath.
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