Blood physiology: 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 · Blood physiology

Sample item

What is the major function of albumin in plasma?

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

The answer and the reasoning

C. Maintain oncotic pressure

Albumin is the most abundant plasma protein and makes the largest contribution to colloid oncotic pressure, helping retain fluid within the circulation.

Option by option

  • A. Destroy bacteria

    Leukocytes and immune proteins, not albumin, primarily destroy bacteria.

  • B. Carry oxygen mainly

    Hemoglobin in erythrocytes carries most oxygen, not albumin.

  • C. Maintain oncotic pressure (correct)

    Correct: albumin maintains plasma oncotic pressure.

  • D. Form platelet plug

    Platelets form the primary hemostatic plug.

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.

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Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is C, Maintain oncotic pressure. Albumin is the most abundant plasma protein and makes the largest contribution to colloid oncotic pressure, helping retain fluid within the circulation.

Why is "Destroy bacteria" not the answer?

Leukocytes and immune proteins, not albumin, primarily destroy bacteria.

Why is "Carry oxygen mainly" not the answer?

Hemoglobin in erythrocytes carries most oxygen, not albumin.

Why is "Form platelet plug" not the answer?

Platelets form the primary hemostatic plug.

What concept does this question test?

It tests Blood physiology in Physiology. The correct option holds because: Correct: albumin maintains plasma oncotic pressure.

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 Blood physiology?

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.