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Question

The additional volume of air a person can inspire by a forceful inspiration is called

A
Inspiratory Capacity
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B
Inspiratory Reserve Volume
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C
Tidal Volume
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D
Functional Residual Capacity
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Solution

The correct option is B Inspiratory Reserve Volume
The additional volume of air a person can inspire by a forceful inspiration is called Inspiratory Reserve Volume (IRV). It is about 3000 ml. Inspiratory Capacity (IC) is the total volume of air a person can inspire after a normal expiration. This includes tidal volume and inspiratory reserve volume (TV+IRV). Functional Residual Capacity (FRC) is the volume of air remaining in the lungs after a normal expiration (ERV+RV). Vital Capacity (VC) is the maximum volume of air a person can inspire after a forced expiration or the maximum volume of air a person can breathe out after a forced inspiration (IC+ERV), and is approximately 4700 ml.

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