Biology Reproduction ETEA 2019
PMDC Verified Question 64 of 81
Progesterone is secreted by:
A
Ripening follicles
B
Corpus luteum
C
Uterine epithelium
D
Fertilized egg
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Corpus luteum
Concept:

Post-ovulation, the empty follicle undergoes a physical and biochemical transformation to support a potential pregnancy.

Solution:

  • After the egg is released, LH acts on the remaining follicular cells, transforming them into a temporary yellow endocrine gland called the corpus luteum.


  • The primary function of this corpus luteum is the massive secretion of the hormone progesterone, which maintains the uterine lining.


Why other options are incorrect:

Ripening follicles secrete primarily estrogen. The uterine epithelium responds to progesterone but doesn't secrete it. The fertilized egg (embryo) later secretes hCG, not progesterone directly.

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