Human Performancemedium#992
Trapped gas in the body expands with increasing altitude (Boyle's Law), which can cause:
A
no discomfort
B
improved hearing
C
ear and sinus pain, gastrointestinal discomfort
CorrectD
reduced body temperature
Explanation
As pressure decreases, trapped gas expands, causing pain in the ears, sinuses, teeth (barodontalgia), and GI tract.
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