Question

The volume of air that remains in the lungs after a normal expiration is called _______________________

• A. functional residual capacity
• B. residual volume
• C. tidal volume
• D. inspiratory capacity

Answer 1

The correct option is A functional residual capacity

The volume of air that remains in the lungs after a normal expiration is called functional residual capacity (FRC). It is the sum of expiratory reserve volume (ERV) and residual volume (RV). Expiratory reserve volume is the volume of air that is exhaled forcefully after normal exhalation. The volume of air left in the lungs after a forceful expiration is called residual volume.
Tidal volume (TV) is the volume of air taken in and out of the lungs during normal breathing.
Inspiratory capacity (IC) is the maximum volume of air that can be breathed in after normal expiration.