Which of the following is true of the relation between drug affinity and drug effects?
A) A drug with high affinity for a receptor will exert an effect only at a very high dose.
B) Drug affinity does not relate to drug activity.
C) A drug with high affinity for a receptor will exert an effect at a low dose.
D) A drug with a low affinity for a receptor will exert an effect only at a very low dose.
E) A drug that has a potent behavioral effect will have a low affinity for its receptor.
Answer: C
Rationale: A drug with high affinity for a receptor will exert an effect at a low dose.
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