Which of the following conditions must exist for gas to move between the alveolus and pulmonary capillary?

Question

Quizplus · Accepted Answer

Gas exchange between the alveolus and pulmonary capillary requires a difference in partial pressures, specifically oxygen and carbon dioxide. Oxygen moves from the alveolus into the capillary because the partial pressure of oxygen is greater in the alveolus compared to the capillary. Similarly, carbon dioxide moves from the capillary into the alveolus because the partial pressure of carbon dioxide is greater in the capillary compared to the alveolus. Adequate alveolar ventilation, normal CNS control, and sufficient hemoglobin are also important factors in gas exchange, but they are not the primary requirement for gas movement between the alveolus and capillary.

Which of the Following Conditions Must Exist for Gas to Move