Question

Select the correct statement about the events 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.

Answer 1

Answer: (E)

A maturing follicle causes the uterine lining to build up.

Positive feedback on pituitary of estradiol that increases the responsiveness of pituitary to GnRH and promotes LH surge as well as positive feedback of progesterone on the hypothalamus to increase the GnRH secretion regulate the whole cycle. Graffian follicle is transformed into corpus luteum after ovulation. Gonadotropins (LH and FSH) promote growth and maturation of follicle. Lower levels of estrogen and progesterone caused by the absence of fertilization cause the shedding of the uterus lining. A mature follicle releases estrogen and progesterone which in turn causes endometrium thickening during the follicular phase. Thus, the correct answer is option E.