Q. Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of :
A) Residual Volume
B) Inspiratory Reserve Volume
C) Tidal Volume
D) Expiratory Reserve Volume
Explanation
[Solution] The residual volume of air (1100-1200 mL) always remains in the lungs, preventing alveolar collapse. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.