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Question

Listed below are respiratory volumes and capacities with their respective values. Which pair is correctly matched?


A

Residual volume - 2500 ml

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B

Vital capacity - 3500 ml

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C

Inspiratory reserve volume - 1200 ml

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D

Inspiratory capacity - 3500 ml

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Solution

The correct option is D

Inspiratory capacity - 3500 ml


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 around 4700 ml.
Residual Volume (RV) is the volume of air remaining in the lungs even after a forcible expiration, and is about 1200 ml.
Inspiratory Reserve Volume (IRV) is the additional volume of air, a person can inspire by a forcible inspiration, and is approximately 3000 ml.
Inspiratory capacity is the total volume of air a person can inspire after a normal expiration. This is calculated as TV + IRV, which equals 3500 ml.


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