Which receptor action best describes a partial agonist?
Correct answer: D. It produces a submaximal response even at full receptor occupancy
- A. It produces no response at any dose
- B. It reduces the response of every unrelated receptor
- C. It permanently blocks the receptor
- D. It produces a submaximal response even at full receptor occupancy
Explanation
A partial agonist activates its receptor but has lower intrinsic efficacy than a full agonist, so its maximum response is limited. It may also oppose a full agonist by occupying the same receptors.
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Covers how drugs act in animals, including pharmacokinetics, pharmacodynamics, routes of administration, dosage forms, adverse effects and drug interactions. Major groups include antimicrobials, antiparasitics, analgesics, anaesthetics, anti-inflammatory drugs, hormones and cardiovascular medicines, with attention to withdrawal periods and species differences.
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