Which of the following statements correctly describes the role of androgens in the male reproductive system?

Select one:

 GnRH is released by the anterior pituitary and stimulates the release of FSH and LH.

LH stimulates the Sertoli cells to produce inhibin and to start spermatogenesis.

Increased levels of inhibin released by the interstitial cells results in lower levels of FSH and testosterone.

Increased levels of testosterone feedbacks negatively to the anterior pituitary and hypothalamus.

 

 

Around day 21 of the 28-day cycle, administration of estrogen and progestin is stopped for 7 days. Low levels of progesterone result in

Select one:

menstruation, as the endometrium is built up and maintained by progesterone

. suppression of GnRH in the hypothalamus and FSH and LH in the anterior pituitary

 increased levels of estrogen released by the corpus luteum

 increased levels of FSH and LH, resulting in a mature follicle

 

 

 

 

Use the following information to answer the next two questions.Birth control pills are oral contraceptives taken by women to prevent pregnancies. The most effective forms of birth control pills contain estrogen and a small amount of progestin (a synthetic hormone that mimics the effects of progesterone).

 

Question text

The role of estrogen in the birth control pill is to

Select one:

. reduce the progesterone levels in the blood to limit the endometrium buildup

suppress the shedding of endometrium, thus preventing menstruation

negatively feedback to the anterior pituitary to suppress the production of GnRH

 prevent a rise in the FSH and LH levels, thereby preventing follicle maturation