Multiple Choice
Cocaine lowers the levels of a chemical messenger in the brain called enkephalin. Researchers have found the number of enkephalin receptors to be higher in cocaine addicts than nonaddicted people. This is an example of
A) saturation.
B) up-regulation.
C) antagonism.
D) affinity.
E) down-regulation.
Correct Answer:
Verified
Correct Answer:
Verified
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