Question

Why is the partial pressure of oxygen in 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.

Explanation:

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