Multiple Choice
As he is running his first 10k (ten kilometer) race, Apollo finds that he is starting to hurt and wear out at the third mile. He pushes through, and suddenly experiences a brief period where the pain goes away and he can run faster than he had been running. This "runners high" is facilitated by the release of ________.
A) endorphins
B) acetylcholine
C) cortisol
D) dopamine
Correct Answer:

Verified
Correct Answer:
Verified
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