Multiple Choice
Which of the following has not been identified as a potential mechanism explaining the increased susceptibility to upper respiratory tract infections in athletes after prolonged exercise?
A) Impaired natural killer cell activity
B) Decreased concentration of the anti-inflammatory cytokine IL-10
C) Impaired neutrophil function
D) Decreased immunoglobulin A (IgA) in saliva
Correct Answer:

Verified
Correct Answer:
Verified
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