Which of the following lung volumes is the amount of air that enters and exits the lungs during a single quiet breath?
A) tidal volume
B) inspiratory reserve volume
C) residual volume
D) expiratory reserve volume
A
Explanation: Tidal volume is the amount of air that enters and exits the lungs during a single quiet breath. The inspiratory reserve volume is the air that can be forcibly inhaled after a normal respiration. The residual volume is the air remaining in the lungs after a forced exhalation. Expiratory reserve volume is the amount of air that can be forcibly exhaled after a normal quiet respiration.
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