Flashcards in sperm Deck (33)
which two hormones cause the development of the male internal genital tract?
testosterone and mullerian inhibiting factors
in males, the repro tract forms from which ducts?
wolffian, mullerian degenerate
in females? which degenerate?
mullerian, wolffian degenerate
mullerian inhibiting factor, male or female?
name of the visceral layer that covers the testes?
name of the plexus involved in venous drainage of the testis?
name of the muscle that lifts and descends the testes and is controlled by nervous reflexes?
undescended testes term?
cryptorchodism (undescended testes in adulthood)
if it is unilateral, are they fertile?
what is the sperm count like in undescended testes?
procedure that should be performed before 14 to minimise risk of cancer?
if undescended as an adult, consider orchidectomy, why?
risk of cancer increased 6x
what does the acrosome contain?
enzymes for penetrating the ovum
why many mitochondria in centriole
to power the tail
what do the sertolli cells secrete to carry cells to the epididymis?
seminiferous tubule fluid
androgen binding globulin?
released by sertolli cells to bind to testosterone and keep it high in the lumen. this is important for sperm production
what kind of molecules are LH and FSH?
what does LH act on?
leydig cells to produce testosterone
fsh act on?
stroll cells, increased spermatogenesis
secretion of LH and FSH stimulated by?
GnRH (under negative feedback from testosterone)
inhibin and activn secreted by?
inhibin and active feed back on?
sperm have chemoattraction to oocyte. where do they bind to on the egg?
enzymes to break through come from?
site for sperm maturation?
bulbourethral glands function?
secrete mucous to act as a lubrincant
what is the function of the seminal vesicles?
produce semen into the ejaculatory debt, supply fructose, secrete prostaglandins (stimulate motility), secrete fibrinogen (clotting factor)
what do the clotting factors produced by the prostate gland do?
clot semen in the female
what kind of fluid does the prostate gland produce? what is its purpose?
alkali fluid to neutralise acidic environment in the vagina
what two corpus does blood engorge into in the penis?
get contraction f the accessory glands and vas deferent so semen is expelled to urethra
point and shoot. contraction of smooth muscles of urethra and erectile tissues
where is semen produced?