Question:
Vital capacity of lung is _________.
Vital capacity of lung is _________.
Updated On: May 2, 2025
- IRV + ERV + TV + RV
- IRV + ERV + TV – RV
- IRV + ERV + TV
- IRV + ERV
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The Correct Option is C
Approach Solution - 1
The vital capacity of the lungs is the maximum amount of air that can be exhaled after a maximum inhalation. It involves the combination of several lung volumes: Inspiratory Reserve Volume (IRV), Expiratory Reserve Volume (ERV), and Tidal Volume (TV). Thus, vital capacity is calculated as:
Vital Capacity = IRV + ERV + TV
This equation does not include Residual Volume (RV), which is the volume of air remaining in the lungs after a maximum exhalation and is not part of the vital capacity measurement. Therefore, the correct answer is:
IRV + ERV + TV
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Approach Solution -2
The largest volume of air that may be exhaled following a powerful inhale is referred to as vital capacity. The sum of tidal volume (TV), inhalatory reserve volume (IRV), and expiratory reserve volume (ERV), or total lung capacity less residual volume, is what is meant by this term. It ranges from 4.1 to 4.6 litres.
The correct option is (C): IRV + ERV + TV
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