Male reproductive physiology Flashcards
1
Q
when does puberty start
A
9-14 years
2
Q
whats abnormally early puberty
A
precocious puberty
3
Q
whats delayed puberty
A
eunuchoidism
4
Q
functions of the male reproductive system
A
to produce viable sperm
deliver sperm to female
5
Q
what do parasympathetic impulses cause during erection
A
vasodilation of penile arteries
compression of veins by arteries
filling of erectile tissue with blood
6
Q
what do sympathetic impulses do during erection
A
inhibit or end an erection
7
Q
regulation of spermatogenesis and hormone secretion
A
- hypothalamus secretes GnRH
- FSH stimulates sertoli cells
- LH stimulates interstitial cells to produce testosterone
- FSH and testosterone cause spermatogenesis
- testosterone and inhibin feedback to anterior pituitary and hypothalamus to turn down FSH and LH production
- this slows spermatogenesis and testosterone secretion
8
Q
spermatogenesis 3 phases
A
- spermatogonial phase - spermatogonia proliferate by mitotic division
- spermatocyte phase - diploid cells created in spermatogonial phase give rise to haploid cells via meiosis
- spermatid phase - spermatids differentiate into spermatozoa
9
Q
what does FSH do in males
A
stimulates production of sperm (spermatogenesis) in conjunction with testosterone by regulating sertoli cells
10
Q
what does LH do in males
A
stimulates testosterone production by leydig cells
