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NEETZoologyBreathing and Exchange of Gases

What is Inspiratory Reserve Volume (IRV)?

Options

  1. AThe additional volume of air a person can expire by a forceful expiration
  2. BThe volume of air a person can inspire during a normal inspiration
  3. CThe volume of air a person can inspire by a forceful inspiration
  4. DThe volume of air a person can expire during a normal expiration

Correct answer

C. The volume of air a person can inspire by a forceful inspiration

Step-by-step solution

Tidal Volume (TV): Volume of air inspired or expired during a normal respiration. It is approx. 500 mL., i.e., a healthy man can inspire or expire approximately 6000 to 8000 mL of air per minute. Inspiratory Reserve Volume (IRV): Additional volume of air, a person can inspire by a forcible inspiration. This averages 2500 mL to 3000 mL. Expiratory Reserve Volume (ERV): Additional volume of air, a person can expire by a forcible expiration. This averages 1000 mL to 1100 mL.

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