Question

question 6
1 try left
heroin mimics the actions of endorphins, inhibiting pain signals. heroin is an ____ for endorphins.
a. antagonist
b. protagonist
c. agonist
d. glial cell

Explanation:

Agonists mimic the actions of natural substances. Heroin mimics endorphins, so it's an agonist.

Answer:

C. agonist