Membrane transport: 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 · Membrane transport

Sample item

What process moves water across a semipermeable membrane?

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

The answer and the reasoning

D. Osmosis

Osmosis is net water movement across a semipermeable membrane toward the side with higher effective solute concentration.

Option by option

  • A. Active transport

    Active transport uses energy to move solute against gradients.

  • B. Endocytosis

    Endocytosis takes material into vesicles.

  • C. Facilitated diffusion

    Facilitated diffusion concerns carrier-mediated solute movement.

  • D. Osmosis (correct)

    Correct: osmosis is passive water movement.

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 D, Osmosis. Osmosis is net water movement across a semipermeable membrane toward the side with higher effective solute concentration.

Why is "Active transport" not the answer?

Active transport uses energy to move solute against gradients.

Why is "Endocytosis" not the answer?

Endocytosis takes material into vesicles.

Why is "Facilitated diffusion" not the answer?

Facilitated diffusion concerns carrier-mediated solute movement.

What concept does this question test?

It tests Membrane transport in Physiology. The correct option holds because: Correct: osmosis is passive water movement.

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 Membrane transport?

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.