Male Repro Flashcards
3 glands which produce most of semen
seminal vesicle (60%)
prostate (30%)
bulbourethral (5%)
roughly how many sperm per ml of semen
20-200 million
stages from spermatogonium to spermatozoa
spermatogonium –> 1mary spermatocyte –> 2dary spermatocyte –> spermatids –> spermatozoa
important cell types of the male testes
sertoli cells, leydig cells
type of joins between sertoli cells
tight junctions
1 spermatogonia gives how many sperm
4
how long is sperm stored for once matured
15 days
how many divisions does a spermatogonia undergo
1 mitosis and 2 meiotic
what is the difference between mitosis and meiosis
mitosis gives two identical daughter cells which are diploid
meiosis gives 4 germ cells which are haploid
how long it the production of sperm
75 days
3 stages of sperm production
spermatocytogenesis –> meiosis –> spermiogenesis
what cells produce testosterone
leydig (aka interstitial cells)
what cells produce inhibin
sertoli cells
function of sertoli cells
to support sperm producing cells and produce inhibin
site of sperm production
seminiferous tubule
action of FSH
stimulates spermatogonia into spermatogenesis
action LH
stimulate testosterone release from leydig cells in testes
action of testosterone
maintain sustentacular cells (e.g. sertoli cells) and produce male characteristics
true/false - sertoli cells are stimulated by FSH and androgens
true
what is an androgen
a male sex steroid hormone such as testosterone
journey of sperm from testes to vagina
testes –> epididymis –> vas deferens –> urethra –> out
what is the process of spermiogenesis
spermatid –> sperm (with tails)
when does sperm production begin
at puberty
sites of problems that may affect oogenesis or spermatogenesis
hormonal - hypothalamus, pituitary, ovary/testes
production - ovary/testes
