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Breathing and Exchange of Gases question

2023 · Q65
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Breathing and Exchange of Gases question

2023 · Q65

NEETBiologyBreathing and Exchange of GasesMCQ+4 / −1

Vital capacity of lung is ________.

  1. A
    IRV + ERV + TV + RV
  2. B
    IRV + ERV + TV – RV
  3. C
    IRV + ERV + TV
  4. D
    IRV + ERV
View written solutionFree

Correct answer: C

The vital capacity (VC) of the lung is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume (IRV), tidal volume (TV), and expiratory reserve volume (ERV).

nspiratory reserve volume (IRV) is the amount of air that can be inhaled beyond a normal breath.

Expiratory reserve volume (ERV) is the amount of air that can be exhaled beyond a normal breath.

Tidal volume (TV) is the amount of air that is inhaled and exhaled during a normal breath.

Therefore, vital capacity (VC) = IRV + ERV + TV.

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