A(n) _____ is a drug or other chemical that binds to a receptor site and triggers a response in the cell.
A) antagonist
B) endorphin
C) agonist
D) opiate

Question

Quizplus · Accepted Answer

An agonist is a drug or chemical that binds to a receptor site and triggers a response in the cell. It mimics the effects of a natural neurotransmitter or hormone.

Options A, B, and D are incorrect because they do not fully describe the mechanism of action of a drug or chemical on a receptor site. Antagonists bind to receptors but do not trigger a response, endorphins are natural neurotransmitters that bind to opioid receptors and produce pain relief, and opiates are drugs that bind to opioid receptors and mimic the effects of endorphins.

A(n) _____ Is a Drug or Other Chemical That Binds