Neurophysiology: 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 · Neurophysiology

Sample item

Which component of a simple reflex arc carries information from a receptor toward the central nervous system?

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

The answer and the reasoning

A. Afferent sensory neuron

An afferent sensory neuron transmits signals from a peripheral receptor into the central nervous system, where integration can produce a rapid response through an efferent motor neuron to an effector.

Option by option

  • A. Afferent sensory neuron (correct)

    Correct: afferent neurons carry sensory input toward the CNS.

  • B. Efferent motor neuron

    Efferent neurons carry commands away from the CNS.

  • C. Neuromuscular junction only

    The neuromuscular junction is one peripheral synapse, not the sensory limb of the reflex.

  • D. Effector muscle only

    The effector performs the response rather than carrying sensory input.

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 A, Afferent sensory neuron. An afferent sensory neuron transmits signals from a peripheral receptor into the central nervous system, where integration can produce a rapid response through an efferent motor neuron to an effector.

Why is "Efferent motor neuron" not the answer?

Efferent neurons carry commands away from the CNS.

Why is "Neuromuscular junction only" not the answer?

The neuromuscular junction is one peripheral synapse, not the sensory limb of the reflex.

Why is "Effector muscle only" not the answer?

The effector performs the response rather than carrying sensory input.

What concept does this question test?

It tests Neurophysiology in Physiology. The correct option holds because: Correct: afferent neurons carry sensory input toward the CNS.

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 Neurophysiology?

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.