Question

Gasses diffuse over the respiratory surface because of
A. `po_(2)` is more in alveoli than in blood
B. `pO_(2)` is more in tissues than in blood
C. `pCO_(2)` is more in alveoli than in blood
D. `pCO_(2)` is more in blood than in tissues

Answer 1

Correct Answer - A
Gasses diffuse over the respiratory surface because of `pO_(2)` is more in alveoli (104 mm Hg) than in blood (40 mm Hg).