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

Water moves across a semipermeable membrane mainly by what process?

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

The answer and the reasoning

A. Osmosis

The relevant Membrane transport principle makes Osmosis the best answer because it directly explains the structure or physiological response in the stem.

Option by option

  • A. Osmosis (correct)

    Correct. Osmosis directly follows from the core membrane transport relationship.

  • B. Filtration only

    Filtration only is not supported by the key clue provided in this item.

  • C. Active transport

    Active transport does not correspond to the structure or response being tested.

  • D. Endocytosis

    Endocytosis is associated with a different anatomical or physiological role.

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 A, Osmosis. The relevant Membrane transport principle makes Osmosis the best answer because it directly explains the structure or physiological response in the stem.

Why is "Filtration only" not the answer?

Filtration only is not supported by the key clue provided in this item.

Why is "Active transport" not the answer?

Active transport does not correspond to the structure or response being tested.

Why is "Endocytosis" not the answer?

Endocytosis is associated with a different anatomical or physiological role.

What concept does this question test?

It tests Membrane transport in Physiology. The correct option holds because: Correct. Osmosis directly follows from the core membrane transport relationship.

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.