F3

Question 1

Spermatogenesis

Answer 1

The production of sperm

Question 2

Spermatogenesis process

Answer 2

Mitosis:
Spermatogonia (2n) -> Primary spermatocyte (2n)
Meiosis I:
Primary spermatocyte -> 2 secondary spermatocytes (1n)
Meiosis II:
Secondary spermatocytes (1n) -> 4 spermatids (1n)

Question 3

What role does FSH play in spermatogenesis and testosterone production?

Answer 3

Stimulates spermatogenesis indirectly by stimulating sustentocytes to release ABP.
ABP keeps concentration of testosterone high, promoting spermatogenesis.

Question 4

What affect does inhibin have on FSH release?

Answer 4

Inhibin inhibits FSH release.

Question 5

ABP

Answer 5

Keeps concentration of testosterone high, promoting spermatogenesis.

Question 6

What role does LH play in spermatogenesis and testosterone production?

Answer 6

LH stimulates interstitial cells to secrete testosterone.

Question 7

Testosterone is synthesized from ______ and converted to _____.

Answer 7

Synthesized from cholesterol;

Converted to DHT

Question 8

Testosterone

Answer 8

Promotes spermatogenesis;
Triggers activity in accessory glands;
Induces development of secondary sex characteristics

Question 9

What are three results from testosterone deficiency?

Answer 9

Atrophy of accessory organs;
Semen volume declines;
Erection/ejaculation are impaired

Question 10

What secondary sex characteristics are induced by testosterone?

Answer 10

Pubic/facial/chest hair, deepening of voice, increase in muscle mass, sex drive, bones grow