Endorphins are released in the brain in response to morphine or heroin. pain or vigorous exercise. the

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Endorphins are released in the brain in response to morphine or heroin.

pain or vigorous exercise.

the all-or-none response.

all of the above.

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Psychology In Everyday Life

ISBN: 9781319101039

Fourth Edition

Authors: David G. Myers, C. Nathan DeWall

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