The tendency of a drug to combine with its receptor is called:

Affinity is a close relationship, mutual attraction, or similarity. The tendency of a drug to combine with its receptor is called affinity. Affinity is a measure of the strength of the drug-receptor bonding. Choices 1 and 2 describe the capability of a drug to produce the desired effect. Choice 3 is the branch of science that deals with the effects of forces on the motions of material bodies or with changes in a physical or chemical system.Pharmacological Therapies