1.

Gasses diffuse over the respiratory surface because ofA. `po_(2)` is more in alveoli than in bloodB. `pO_(2)` is more in tissues than in bloodC. `pCO_(2)` is more in alveoli than in bloodD. `pCO_(2)` is more in blood than in tissues

Answer» 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).


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