You embark on a hiking trip on Mt.Kilimanjaro (altitude = 19,000 ft;Atmospheric air pressure = 379 mmHg).As you ascend,what happens to the PO₂ in the alveoli?

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As altitude increases, atmospheric pressure decreases. This causes air to become less dense, which means there are fewer oxygen molecules per volume of air. As a result, the alveolar PO₂ decreases. This can lead to altitude sickness and other complications related to oxygen deprivation. It is important to acclimate gradually to higher altitudes and maintain proper oxygenation.

You Embark on a Hiking Trip on Mt