Multiple choice

The amount of air, which can be forcibly expired out after a normal expiration is called _________.

  1. tidal volume

  2. inspiratory reserve volume

  3. expiratory reserve volume

  4. residual volume

  5. inspiratory capacity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Expiratory reserve volume is the maximal amount of gas that can be exhaled from the resting end-expiratory level. In a deep and forceful expiration, the lungs are capable of exhaling a volume which is in excess to the tidal volume and the inspiratory reserve volume. This is known as the expiratory reserve volume (ERV). In a healthy young adult ERV is approximately 1.3 – 1.5 litres.

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