Biology Chemical Coordination UHS 2023
PMDC Verified Question 14 of 50
What is true about Oxytocin?
A
Acts on kidney tubules
B
Stimulates ICSH
C
Perform cellular fun
D
Dilate milk ducts of mammary glands
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Dilate milk ducts of mammary glands
Concept:

Oxytocin targets specific smooth muscle tissues in the female reproductive system.

Solution:

  • In lactating mothers, suckling triggers the release of oxytocin from the posterior pituitary.


  • Oxytocin reaches the mammary glands via the blood and binds to myoepithelial cells, causing them to contract and dilate the milk ducts, forcefully ejecting the milk (let-down reflex).


Why other options are incorrect:

ADH (not oxytocin) acts on kidney tubules. GnRH stimulates ICSH. It has no generalized "cellular fun" role.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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