Question

why is the partial pressure of oxygen in the atmosphere higher than the partial pressure of oxygen in the alveoli

Answer 1

Answer:

Carbon dioxide diffuses in the opposite direction since the partial pressure is greater in the blood entering the lungs than it is in the alveolar air. Again, the gases move from a high to a low partial pressure. The partial pressure of oxygen is lower in the blood than in alveoli, so it diffuses into the blood.

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Answer 2

Answer:

Partial pressure is defined as a pressure contributed by an individual gas in a mixture of gases.....

Explanation:

partial pressure of oxygen in atmosphere is higher than the partial pressure of oxygen in alveoli because In atmosphere concentration of Oxygen is more with respect to alveoli so more pressure is applied by a mixture of gas that's why partial pressure of Oxygen is higher wrt alveoli....