NEETZoologyBreathing and Exchange of Gases
What is the average Inspiratory Reserve Volume (IRV) in healthy adults?
Options
- A1500 mL to 2000 mL
- B2500 mL to 3000 mL
- C3500 mL to 4000 mL
- D4500 mL to 5000 mL
Correct answer
B. 2500 mL to 3000 mL
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.