Reproductive physiology: lactation: 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 · Reproductive physiology: lactation

Sample item

Which hormone mediates milk ejection in response to infant suckling?

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

The answer and the reasoning

C. Oxytocin

Oxytocin contracts myoepithelial cells around mammary alveoli to produce milk ejection. Prolactin primarily stimulates milk synthesis.

Option by option

  • A. FSH

    FSH regulates ovarian follicle development.

  • B. Prolactin

    Prolactin supports milk production rather than ejection.

  • C. Oxytocin (correct)

    Correct. Oxytocin causes the let-down reflex.

  • D. Estrogen

    Estrogen promotes breast development but does not mediate let-down.

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, Oxytocin. Oxytocin contracts myoepithelial cells around mammary alveoli to produce milk ejection.

Why is "FSH" not the answer?

FSH regulates ovarian follicle development.

Why is "Prolactin" not the answer?

Prolactin supports milk production rather than ejection.

Why is "Estrogen" not the answer?

Estrogen promotes breast development but does not mediate let-down.

What concept does this question test?

It tests Reproductive physiology: lactation in Physiology. Prolactin primarily stimulates milk synthesis.

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 Reproductive physiology: lactation?

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.