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 does a competitive antagonist usually do to an agonist dose-response curve?

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

The answer and the reasoning

B. Shifts it rightward

The key Pharmacodynamics principle identifies Shifts it rightward as the best answer because it most directly accounts for the mechanism, use, or laboratory finding described.

Option by option

  • A. Causes irreversible binding always

    Causes irreversible binding always is inconsistent with the requested mechanism or identification.

  • B. Shifts it rightward (correct)

    Correct. Shifts it rightward matches the decisive principle in this item.

  • C. Increases intrinsic activity

    Increases intrinsic activity may have another clinical role but is not supported by this clue.

  • D. Eliminates all receptors

    Eliminates all receptors does not fit the stated pharmacodynamics relationship.

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.

More Pharmacology questions

Questions about this Pharmacology question

What is the answer to this Pharmacology question?

The best answer is B, Shifts it rightward. The key Pharmacodynamics principle identifies Shifts it rightward as the best answer because it most directly accounts for the mechanism, use, or laboratory finding described.

Why is "Causes irreversible binding always" not the answer?

Causes irreversible binding always is inconsistent with the requested mechanism or identification.

Why is "Increases intrinsic activity" not the answer?

Increases intrinsic activity may have another clinical role but is not supported by this clue.

Why is "Eliminates all receptors" not the answer?

Eliminates all receptors does not fit the stated pharmacodynamics relationship.

What concept does this question test?

It tests Pharmacodynamics in Pharmacology. The correct option holds because: Correct. Shifts it rightward matches the decisive principle in this item.

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.