Spermatogenisis

Question 1

When does spermatogenisis occur?

Answer 1

Sexual maturity

Question 2

How do spermatogonia increase in number?

Answer 2

Mitosis

Question 3

How many chromosomes do spermatogonia have?

Answer 3

46

Question 4

Spermatocytes divide via what?

Answer 4

Meiosis

Question 5

What does meiosis create?

Answer 5

4 sperm cells with unique sets of genes

Question 6

How many chromosomes are left after meiosis?

Answer 6

23

Question 7

Sperm anatomy components

Answer 7

Head
Midpiece
Tail/ flagellum

Question 8

What’s in the head of sperm?

Answer 8

Nucleus
Acrosome with enzymes to penetrate oocyte outer protective layer

Question 9

Midpiece of sperm

Answer 9

Contains mitochondria for energy for tail

Question 10

Flagillum

Answer 10

Provides mobility

Question 11

What does LH do in spermatogenisis?

Answer 11

Targets interstitial endocrine cells which release testosterone

Question 12

Increased levels of testosterone does what in spermatogensis?

Answer 12

Turns off GnRH and APG hormones
Spermatocytes undergo spermatogenisis

Question 13

What does FSH do in males?

Answer 13

Target sustenocytes which release APB and Inhibin

Question 14

What does APB do in spermatogenisis?

Answer 14

Keeps testosterone high for spermatogenisis

Question 15

What does inhibin do in spermatogenisis?

Answer 15

Turns off GnRH and APG hormones when sperm count gets high