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

Suckling causes milk ejection by increasing release of which hormone from the posterior pituitary?

AOxytocinBFSHCDopamineDProlactin

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

The answer and the reasoning

A. Oxytocin

Oxytocin contracts myoepithelial cells around mammary alveoli to eject milk. Prolactin from the anterior pituitary supports milk production.

Option by option

A. Oxytocin (correct)
Correct. Oxytocin mediates the let-down reflex.
B. FSH
FSH regulates ovarian follicular development.
C. Dopamine
Dopamine inhibits prolactin secretion.
D. Prolactin
Prolactin drives synthesis of milk, not acute ejection.

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.

Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is A, Oxytocin. Oxytocin contracts myoepithelial cells around mammary alveoli to eject milk.

Why is "FSH" not the answer?

FSH regulates ovarian follicular development.

Why is "Dopamine" not the answer?

Dopamine inhibits prolactin secretion.

Why is "Prolactin" not the answer?

Prolactin drives synthesis of milk, not acute ejection.

What concept does this question test?

It tests Reproductive physiology: lactation in Physiology. Prolactin from the anterior pituitary supports milk production.

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.