SAT Subject Biology Practice Question 56: Answer and Explanation

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Question: 56

5. Which correctly describes a process or event in the female reproductive cycle?

A. The cycle is regulated via a negative feedback loop.
B. The corpus luteum releases an egg into a fallopian tube.
C. Estrogen and progesterone cause a follicle to mature.
D. Pituitary hormones cause the uterine lining to be shed monthly.
E. A maturing follicle causes the uterine lining to build up.

Correct Answer: E


Pituitary hormones cause a follicle in the ovary to mature and release an egg. The maturing follicle secretes estrogen and progesterone, causing the uterine lining to build up. After the egg is released, the follicle forms a corpus luteum, which disintegrates if pregnancy does not occur. This loss of the corpus luteum causes estrogen and progesterone levels to drop, which in turn causes the uterine lining to be shed.

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