Pharmacodynamics: practice question

A Pharmacology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Pharmacology · Pharmacodynamics

Sample item

What is an antagonist at a receptor?

ADrug that increases absorptionBDrug that always activates receptorCDrug that produces ATPDDrug that blocks agonist effect

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Drug that blocks agonist effect

An antagonist binds a receptor without activating it sufficiently to produce the agonist effect, thereby reducing or blocking receptor-mediated signaling.

Option by option

A. Drug that increases absorption
Absorption is a pharmacokinetic process.
B. Drug that always activates receptor
An agonist activates the receptor.
C. Drug that produces ATP
ATP production is not a receptor-antagonist definition.
D. Drug that blocks agonist effect (correct)
Correct: antagonist blocks or reduces agonist receptor effect.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Pharmacology question

What is the answer to this Pharmacology question?

The best answer is D, Drug that blocks agonist effect. An antagonist binds a receptor without activating it sufficiently to produce the agonist effect, thereby reducing or blocking receptor-mediated signaling.

Why is "Drug that increases absorption" not the answer?

Absorption is a pharmacokinetic process.

Why is "Drug that always activates receptor" not the answer?

An agonist activates the receptor.

Why is "Drug that produces ATP" not the answer?

ATP production is not a receptor-antagonist definition.

What concept does this question test?

It tests Pharmacodynamics in Pharmacology. The correct option holds because: Correct: antagonist blocks or reduces agonist receptor effect.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Pharmacodynamics?

Learn drugs as classes, then the exception in each class that an examiner would pick. Then use the flashcards and the other Pharmacology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.