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Question

The maximum volume of air a person can breathe in after forceful exhalation is called
  1. total lung capacity
  2. vital capacity
  3. functional residual capacity
  4. inspiratory capacity


Solution

The correct option is B vital capacity
Vital capacity is defined as the maximum volume of air that can be breathed in after a forceful expiration or it can also be defined as the maximum volume of air that can be breathed out after a forceful inspiration. Vital capacity (VC) is the sum of expiratory reserve volume (ERV), tidal volume (TV) and inspiratory reserve volume (IRV).
Total lung capacity (TLC) is the maximum amount of air the lungs can hold after forceful inspiration. 
Inspiratory capacity (IC) is the maximum volume of air that can be breathed in after normal expiration.
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 and residual volume. 
 

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