Coagulation: practice question

A Physiology 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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Physiology · Coagulation

Sample item

Which endogenous anticoagulant accelerates inactivation of thrombin and factor Xa?

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

The answer and the reasoning

B. Antithrombin

This item reviews Coagulation; Antithrombin is the best answer because it directly fits the anatomical or physiological relationship described.

Option by option

  • A. Fibrinogen

    Fibrinogen is not supported by the key finding.

  • B. Antithrombin (correct)

    Correct. Antithrombin matches the defining feature.

  • C. Protein C

    Protein C is plausible but is not the best answer.

  • D. Plasmin

    Plasmin does not match the stated 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 Physiology questions

Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is B, Antithrombin. This item reviews Coagulation; Antithrombin is the best answer because it directly fits the anatomical or physiological relationship described.

Why is "Fibrinogen" not the answer?

Fibrinogen is not supported by the key finding.

Why is "Protein C" not the answer?

Protein C is plausible but is not the best answer.

Why is "Plasmin" not the answer?

Plasmin does not match the stated relationship.

What concept does this question test?

It tests Coagulation in Physiology. The correct option holds because: Correct. Antithrombin matches the defining feature.

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 Coagulation?

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology 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.