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Question

The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of a forced inspiration. This includes:

A
RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV
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B
RV; ERV; IC and EC
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C
RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity)
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D
RV (Residual Volume); ERV (Expiratory Reserve Volume);
TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
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Solution

The correct option is D RV (Residual Volume); ERV (Expiratory Reserve Volume);
TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
Total lung capacity (TLC) is the maximum volume of air present in the lungs after forceful inspiration.

It is the sum of residual volume (RV), expiratory reserve volume (ERV), inspiratory reserve volume (IRV), and tidal volume (TV).

TLC = RV + ERV + TV + IRV

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