SAT Subject Biology Practice Question 216: Answer and Explanation

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Question: 216

6. Which structure releases hormones that signal the tissue lining the uterus to thicken?

A. Corpus luteum
B. Developing follicle
C. Fallopian tube
D. Hypothalamus
E. Pituitary

Correct Answer: A

Explanation:

The corpus luteum, which forms after an egg is released from a follicle in the ovary, secretes estrogen and progesterone. These hormones cause the uterine lining to thicken. If a fertilized egg does not implant, the corpus luteum shrivels and the uterine lining is shed.

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