Question

which of the following lung volumes is the amount of air that enters or exits the lungs during a single quiet breath?
a tidal volume
b inspiratory reserve volume
c residual volume
d expiratory reserve volume

Explanation:

Tidal volume is the volume of air that moves in or out of the lungs during a normal quiet breath. Inspiratory reserve volume is the extra air that can be inhaled after a normal inhalation. Residual volume is the air remaining in the lungs after a forced exhalation. Expiratory reserve volume is the extra air that can be exhaled after a normal exhalation.

Answer:

A. tidal volume