Structure and Function of Male Genitourinary System Flashcards Preview

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Flashcards in Structure and Function of Male Genitourinary System Deck (37)
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1

promotes the conversion of embryonic glands to testes in utero

testis-determining factor

2

cells secrete testosterone beginning at the 8th week, masculinizes embryonic structures, and then hibernate until puberty

Leydig

3

Testes develop in abdominal cavity and descend through what to get to pouch of peritoneum (tunica vaginalis)?

inguinal canal

4

Causes wrinkles on scrotum

dartos muscle

5

Responsible for elevating the scrotum

cremaster muscle

6

site of sperm production. lead into efferent ducts

seminiferous tubules

7

What do efferent ducts emerge to form and is also the final site of sperm maturation?

epididymis

8

serves as a storage reservoir for sperm

ampulla of the vas deferens

9

Secretion of what hormone inhibits anterior pituitary release of FSH

inhibin

10

What hormone inhibits LH and GnRH production?

testosterone

11

Contain receptor proteins for FSH in Sertoli cells

seminiferous tubules

12

LH stimulates secretion of testosterone. Contain receptor proteins for LH

leydig cells

13

When are the leydig cells fully mature?

10yrs

14

Embryonically the determining factor in the development of male or female genital organs and characteristics

testosterone

15

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

16

If a male child is born with undescended testicles, what can be used to cause testes to descend in usual manner?

testosterone or LH

17

Both ovarian and testicular tissue is present in the body

intersex

18

Most common cause of female pseudohemaphroditism

congenital adrenal hyperplasia

19

mature for two months until they become spermatozoa

spermatids

20

Actually envelope spermatids for processing before release into lumen (protect and nurse sperm)

Sertoli cells

21

divide in two stages, one of which is by the process of meiosis to form four spermatids, each containing 23 unpaired chromosomes

spermatocytes

22

Four main functions of sertoli cells

form blood-testes barrier, secrete inhibin and androgen-binding protein, phagocytize residual bodies

23

Where do sperm become fully motile and go through final maturation?

epididymis

24

Regulates conversion of spermatogonia into spermatocytes

FSH

25

secrete mucoid material containing fructose, citric acid, prostaglandins, and fibrinogen

seminal vesicle

26

fluid from vas deferens, seminal vesicles, prostate gland, as well as the bulbourethral glands and glands throughout the urethra

semen

27

Average sperm count for ejaculate

400 million

28

Each ductus deferens is cut and tied. Interferes with sperm transport

vasectomy

29

Where are the most important sensory nerve signals located of male reproductive system?

glans penis

30

caused by parasympathetic impulses from sacral portion of spinal cord to penis. dilates arteries of the penis leading to high pressure flow into erectile tissue

erection