Biology Chemical Coordination UHS 2022
PMDC Verified Question 33 of 50
A hormone that plays a major role in social bonding, childbirth, milk ejection and sexual reproduction is:
A
Oxytocin
B
Estrogen
C
Prolactin
D
Secretin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Oxytocin
Concept:

Oxytocin is a potent peptide hormone synthesized in the hypothalamus and released by the posterior pituitary gland.

Solution:

  • Often referred to as the "bonding hormone", oxytocin is critical for uterine contractions during labor (positive feedback) and stimulates the myoepithelial cells in mammary glands to cause milk ejection (let-down reflex).


  • It also plays a significant psychological role in social bonding and maternal behaviors.


Why other options are incorrect:

Prolactin stimulates milk production (not ejection). Estrogen develops female secondary sex characteristics, and secretin is a digestive hormone.

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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