Mod 11 - Male Reproductive System - Hormones

Question 1

What is the effect on FSH secretion in the male?

Answer 1

Binds to sustentacular (Sertoli) cells of seminiferous tubules, causes the production of Androgen Binding Protein (ABP).

Question 2

What is the effect of gonadotropin releasing hormone (GnRH) in the male?

Answer 2

Stimulates FSH and LH secretion from the anterior pituitary.

Question 3

i. What are some effects of testosterone on the hypothalamus and anterior pituitary?
ii. What about in the body?

Answer 3

i. Inhibition of GnRH; reduction in FSH and LH

ii. Development of sex organs and secondary sex characteristics.

Question 4

Where is inhibin produced and what is its role?

Answer 4

Sustentacular cells

Inhibits FSH secretion

Question 5

Which 5 hormones regulate the rate of testosterone secretion from the testes?

Answer 5

GnRH
LH
FSH
Testosterone
Inhibin

Question 6

What is the effect of LH secretion in the male?

Answer 6

Stimulates testosterone secretion by interstitial (Leydig) cells of testes.

Question 7

NOT a hormone, but what do Sertoli (sustentacular) cells do?

Answer 7

Produce Androgen Binding Protein (ABP) to trap testosterone in the seminiferous tubule to increase the rate of sperm production.