Male Repro

Question 1

3 glands which produce most of semen

Answer 1

seminal vesicle (60%)
prostate (30%)
bulbourethral (5%)

Question 2

roughly how many sperm per ml of semen

Answer 2

20-200 million

Question 3

stages from spermatogonium to spermatozoa

Answer 3

spermatogonium –> 1mary spermatocyte –> 2dary spermatocyte –> spermatids –> spermatozoa

Question 4

important cell types of the male testes

Answer 4

sertoli cells, leydig cells

Question 5

type of joins between sertoli cells

Answer 5

tight junctions

Question 6

1 spermatogonia gives how many sperm

Answer 6

4

Question 7

how long is sperm stored for once matured

Answer 7

15 days

Question 8

how many divisions does a spermatogonia undergo

Answer 8

1 mitosis and 2 meiotic

Question 9

what is the difference between mitosis and meiosis

Answer 9

mitosis gives two identical daughter cells which are diploid

meiosis gives 4 germ cells which are haploid

Question 10

how long it the production of sperm

Answer 10

75 days

Question 11

3 stages of sperm production

Answer 11

spermatocytogenesis –> meiosis –> spermiogenesis

Question 12

what cells produce testosterone

Answer 12

leydig (aka interstitial cells)

Question 13

what cells produce inhibin

Answer 13

sertoli cells

Question 14

function of sertoli cells

Answer 14

to support sperm producing cells and produce inhibin

Question 15

site of sperm production

Answer 15

seminiferous tubule

Question 16

action of FSH

Answer 16

stimulates spermatogonia into spermatogenesis

Question 17

action LH

Answer 17

stimulate testosterone release from leydig cells in testes

Question 18

action of testosterone

Answer 18

maintain sustentacular cells (e.g. sertoli cells) and produce male characteristics

Question 19

true/false - sertoli cells are stimulated by FSH and androgens

Answer 19

true

Question 20

what is an androgen

Answer 20

a male sex steroid hormone such as testosterone

Question 21

journey of sperm from testes to vagina

Answer 21

testes –> epididymis –> vas deferens –> urethra –> out

Question 22

what is the process of spermiogenesis

Answer 22

spermatid –> sperm (with tails)

Question 23

when does sperm production begin

Answer 23

at puberty

Question 24

sites of problems that may affect oogenesis or spermatogenesis

Answer 24

hormonal - hypothalamus, pituitary, ovary/testes

production - ovary/testes