Q. The partial pressures (in mm Hg) of oxygen ($O_2$) and carbon dioxide ($CO_2$) at alveoli (the site of diffusion) are:
A) $pO_2$ = 40 and $pCO_2$ = 45
B) $pO_2$ = 95 and $pCO_2$ = 40
C) $pO_2$ = 159 and $pCO_2$ = 0.3
D) $pO_2$ = 104 and $pCO_2$ = 40
Explanation
[Solution] Alveolar air has $pO_2$ = 104 mm Hg and $pCO_2$ = 40 mm Hg. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.