Q. The partial pressure of oxygen in the alveoli of the lungs is
A) equal to that in the blood
B) more than that in the blood
C) less than that in the blood
D) less than that of the carbon dioxide
Explanation
[Solution] Alveolar $pO_2$ (104 mm Hg) exceeds that of deoxygenated blood (40 mm Hg), driving diffusion into blood. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.