The brain produces a morphine-like substance, which serve as a natural painkiller in the body:
a. agonists
b. antagonist
c. hormones
d. endorphins
D
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James Olds and Peter Milner provided rats with the opportunity to electrically stimulate their own pleasure centers in the brains by pressing a lever. What was a key finding of that experiment?
A. The rats avoided the lever completely. B. The rats showed restraint and rarely pressed the lever. C. The rats would press the lever, but stop during feeding time. D. The rats chose to press the lever rather than seek food, sex, and water.
Developmental norms indicate
a. the mean age at which individuals display behaviors and abilities. b. the median age at which individuals display behaviors and abilities. c. the modal age at which individuals display behaviors and abilities. d. the exact age at which individuals display behaviors and abilities.
What is the method called when the penis is gently stretched and medication to increase blood flow is introduced to the penis?
a. Sensate focus b. Vacuum constriction c. Intracavernous injections d. Squeeze technique
Application of aversive activities is based on what principle? ___________
Fill in the blank(s) with correct word