Flashcards in Structure and Function of Male Genitourinary System Deck (37)
promotes the conversion of embryonic glands to testes in utero
cells secrete testosterone beginning at the 8th week, masculinizes embryonic structures, and then hibernate until puberty
Testes develop in abdominal cavity and descend through what to get to pouch of peritoneum (tunica vaginalis)?
Causes wrinkles on scrotum
Responsible for elevating the scrotum
site of sperm production. lead into efferent ducts
What do efferent ducts emerge to form and is also the final site of sperm maturation?
serves as a storage reservoir for sperm
ampulla of the vas deferens
Secretion of what hormone inhibits anterior pituitary release of FSH
What hormone inhibits LH and GnRH production?
Contain receptor proteins for FSH in Sertoli cells
LH stimulates secretion of testosterone. Contain receptor proteins for LH
When are the leydig cells fully mature?
Embryonically the determining factor in the development of male or female genital organs and characteristics
If the Leydig cells aren’t mature till after the age of 10, how does this differentiation occur?
HCG from mother stimulates testosterone secretion in the fetal testes
If a male child is born with undescended testicles, what can be used to cause testes to descend in usual manner?
testosterone or LH
Both ovarian and testicular tissue is present in the body
Most common cause of female pseudohemaphroditism
congenital adrenal hyperplasia
mature for two months until they become spermatozoa
Actually envelope spermatids for processing before release into lumen (protect and nurse sperm)
divide in two stages, one of which is by the process of meiosis to form four spermatids, each containing 23 unpaired chromosomes
Four main functions of sertoli cells
form blood-testes barrier, secrete inhibin and androgen-binding protein, phagocytize residual bodies
Where do sperm become fully motile and go through final maturation?
Regulates conversion of spermatogonia into spermatocytes
secrete mucoid material containing fructose, citric acid, prostaglandins, and fibrinogen
fluid from vas deferens, seminal vesicles, prostate gland, as well as the bulbourethral glands and glands throughout the urethra
Average sperm count for ejaculate
Each ductus deferens is cut and tied. Interferes with sperm transport
Where are the most important sensory nerve signals located of male reproductive system?