lab M6 L18

Question 1

where does spermatogenesis occur?

Answer 1

seminiferous tubules of testes

Question 2

spermatogenesis steps

Answer 2

1. spermatogonium (stem cells) goes through mitosis (2n)
2. division of spermatogonium makes two identical primary spermatocytes (2n)
3. one primary spermatocyte undergoes meiosis and makes two diverse secondary spermatocytes (1n)
4. the two secondary spermatocytes undergo meiosis and make four diverse spermatids (1n)

Question 3

spermiogensis

Answer 3

transforms early spermatids from spermatogenesis into mature sperm (spermatozoa)

Question 4

Leydig cell location

Answer 4

between seminiferous tubules of testes

Question 5

Leydig cell function

Answer 5

produce testosterone

GnRH (hypothalamus) -> luteinizing hormone (pituitary) -> testosterone (Leydig cells)

Question 6

Sertoli cell location

Answer 6

seminiferous tubules

Question 7

Sertoli cells function

Answer 7

promote spermatogenesis

produce inhibin hormone to inhibit FSH release from pituitary, reducing testosterone secretion

GnRH (hypothalamus) -> follicle-stimulating hormone (pituitary) -> inhibins (Sertoli cells)