Field studies suggest that living and exercising at high altitude
A) does not influence immune function.
B) improves immune function by increasing killer cells.
C) improves immune function by increasing the levels of circulating antibodies.
D) depresses immune function and increases the risk of upper respiratory tract infection.
Correct Answer:
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A)edema.
B)increased blood flow
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A)relates to the fact that
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A)children.
B)athletes.
C)sedentary
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