Neurons: 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 · Neurons

Sample item

Which ion influx depolarizes most neurons?

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

The answer and the reasoning

D. Sodium

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

Option by option

  • A. Bicarbonate

    Bicarbonate is not supported by the key finding.

  • B. Potassium

    Potassium does not match the stated relationship.

  • C. Chloride

    Chloride is plausible but is not the best answer.

  • D. Sodium (correct)

    Correct. Sodium matches the defining feature.

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 D, Sodium. This item reviews Neurons; Sodium is the best answer because it directly fits the anatomical or physiological relationship described.

Why is "Bicarbonate" not the answer?

Bicarbonate is not supported by the key finding.

Why is "Potassium" not the answer?

Potassium does not match the stated relationship.

Why is "Chloride" not the answer?

Chloride is plausible but is not the best answer.

What concept does this question test?

It tests Neurons in Physiology. The correct option holds because: Correct. Sodium 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 Neurons?

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.