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?
A. Alveolar PO2 decreases.
B. No change from sea level, as long as we breathe in the same volume of air.
C. Alveolar PO2 increases.
Answer: A
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When an individual is exposed to cold temperatures, total metabolic rate
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