Biology Reproduction MDCAT 2017
PMDC Verified Question 69 of 81
Which of the following hormone causes ovulation?
A
LH
B
Estrogen
C
Progesterone
D
FSH
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: LH
Concept:

Ovulation is a sudden, mechanically violent event requiring a specific hormonal spike.

Solution:

  • Around day 14 of a standard 28-day cycle, the anterior pituitary releases a massive spike of Luteinizing Hormone (LH).


  • This LH surge triggers a cascade of enzymatic reactions that weaken the wall of the mature Graafian follicle.


  • The follicle ruptures, expelling the secondary oocyte into the fallopian tube. Thus, LH causes ovulation.


Why other options are incorrect:

FSH stimulates initial follicle growth. Estrogen prepares the uterus and triggers the LH surge, but doesn't directly rupture the follicle. Progesterone maintains the uterine lining post-ovulation.

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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