Basic Concepts

Question 1

Agonist

Answer 1

bind tightly to a receptor to produce a desired effect. (Morphine activates the receptors that produce analgesia)

Question 2

Antagonist

Answer 2

compete with other molecules and block the usual receptor activity, receptor activity, or other medications. (Losartan- blocks angiotensin II receptors on blood vessels, which prevents vasoconstriction)