The key into a lock analogy best describes:
A) a drug's efficacy
B) a drug's affinity for a receptor
C) breakdown at a receptor site
D) a drug's reuptake

Question

Quizplus · Accepted Answer

The analogy of a key into a lock best describes a drug's affinity for a receptor. Just as a key fits into a lock with a specific shape and size, a drug molecule fits into a receptor site with a specific shape and size. The stronger the affinity between the drug and receptor, the higher the likelihood of a biological response.

The Key into a Lock Analogy Best Describes