The release of _____ seems to underlie the "runner's high" and the euphoria sometimes associated with childbirth, painful initiation rites, and sports parachuting.
A)acetylcholine
B)endorphins
C)neurilemma
D)epinephrine

Question

Quizplus · Accepted Answer

Endorphins are neurotransmitters that are released by the brain in response to stress, pain or exercise. They are known to produce a sense of euphoria or "runner's high" often experienced during intense physical activity or emotional experiences such as childbirth or initiation rites. Acetylcholine is involved in muscle contractions, neurilemma is a sheath around peripheral nerves, and epinephrine is involved in the "fight or flight" response.

The Release of _____ Seems to Underlie the "Runner's High