Oxygen diffusion from the alveolus to the pulmonary capillary occurs because A) alveolar PO₂ is greater than capillary PO₂. B) oxygen diffuses faster than carbon dioxide. C) alveolar PCO₂ is greater than capillary PCO₂. D) alveolar PO₂ is less than capillary PCO₂. E) carbon dioxide diffuses faster than oxygen.

Question

Quizplus · Accepted Answer

Oxygen diffusion from the alveolus to the pulmonary capillary occurs because the partial pressure of oxygen (PO2) in the alveoli is greater than the PO2 in the capillaries, driving the diffusion of oxygen into the blood.

Oxygen Diffusion from the Alveolus to the Pulmonary Capillary Occurs