Question

The volume of air that will remain in the lungs after a normal expiration is called:

• A. Vital capacity
• B. Functional residual capacity
• C. Residual volume
• D. Total lung capacity
• E. Inspiratory capacity

Answer 1

The correct option is B Functional residual capacity

The volume of air that remains in the lungs after a normal exhalation is called functional residual capacity. It is the sum of expiratory reserve volume and residual volume.

Therefore, FRC = ERV + RV

Here, expiratory reserve volume is the extra volume of air (1000-1100 mL) one can exhale after a forceful expiration whereas, residual volume is the amount of air (1100-1200 mL) remaining inside the lungs even after forceful expiration.