Distinguish pharmacodynamics from pharmacokinetics and explain how receptor affinity affects drug response.

• A. Pharmacokinetics describes the drug's effects on the body, including receptor interactions; pharmacodynamics describes absorption, distribution, metabolism, and excretion.
• B. Pharmacokinetics describes receptor affinity; pharmacodynamics describes ADME.
• C. Pharmacokinetics describes absorption, distribution, metabolism, and excretion; pharmacodynamics describes the drug's effects on the body, including receptor interactions; higher receptor affinity typically yields a stronger or more potent effect.
• D. Pharmacodynamics describes absorption, distribution, metabolism, and excretion; pharmacokinetics describes receptor interactions.

Answer: (C)