Cell 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 · Cell physiology

Sample item

What movement of molecules occurs down a concentration gradient without energy input?

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

The answer and the reasoning

C. Diffusion

The core Cell physiology relationship supports Diffusion; it is the response that directly accounts for the structural location or physiological change described.

Option by option

  • A. Exocytosis

    Exocytosis is not consistent with the key finding in the stem.

  • B. Endocytosis

    Endocytosis does not fulfill the structural or functional role requested.

  • C. Diffusion (correct)

    Correct. Diffusion is directly supported by the central clue.

  • D. Active transport

    Active transport is associated with a different cell physiology 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.

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Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is C, Diffusion. The core Cell physiology relationship supports Diffusion; it is the response that directly accounts for the structural location or physiological change described.

Why is "Exocytosis" not the answer?

Exocytosis is not consistent with the key finding in the stem.

Why is "Endocytosis" not the answer?

Endocytosis does not fulfill the structural or functional role requested.

Why is "Active transport" not the answer?

Active transport is associated with a different cell physiology relationship.

What concept does this question test?

It tests Cell physiology in Physiology. The correct option holds because: Correct. Diffusion is directly supported by the central clue.

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 Cell 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.