Structure and Function of Male Genitourinary System

Question 1

promotes the conversion of embryonic glands to testes in utero

Answer 1

testis-determining factor

Question 2

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

Answer 2

Leydig

Question 3

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

Answer 3

inguinal canal

Question 4

Causes wrinkles on scrotum

Answer 4

dartos muscle

Question 5

Responsible for elevating the scrotum

Answer 5

cremaster muscle

Question 6

site of sperm production. lead into efferent ducts

Answer 6

seminiferous tubules

Question 7

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

Answer 7

epididymis

Question 8

serves as a storage reservoir for sperm

Answer 8

ampulla of the vas deferens

Question 9

Secretion of what hormone inhibits anterior pituitary release of FSH

Answer 9

inhibin

Question 10

What hormone inhibits LH and GnRH production?

Answer 10

testosterone

Question 11

Contain receptor proteins for FSH in Sertoli cells

Answer 11

seminiferous tubules

Question 12

LH stimulates secretion of testosterone. Contain receptor proteins for LH

Answer 12

leydig cells

Question 13

When are the leydig cells fully mature?

Answer 13

10yrs

Question 14

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

Answer 14

testosterone

Question 15

If the Leydig cells aren’t mature till after the age of 10, how does this differentiation occur?

Answer 15

HCG from mother stimulates testosterone secretion in the fetal testes

Question 16

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

Answer 16

testosterone or LH

Question 17

Both ovarian and testicular tissue is present in the body

Answer 17

intersex

Question 18

Most common cause of female pseudohemaphroditism

Answer 18

congenital adrenal hyperplasia

Question 19

mature for two months until they become spermatozoa

Answer 19

spermatids

Question 20

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

Answer 20

Sertoli cells

Question 21

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

Answer 21

spermatocytes

Question 22

Four main functions of sertoli cells

Answer 22

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

Question 23

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

Answer 23

epididymis

Question 24

Regulates conversion of spermatogonia into spermatocytes

Answer 24

FSH

Question 25

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

Answer 25

seminal vesicle

Question 26

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

Answer 26

semen

Question 27

Average sperm count for ejaculate

Answer 27

400 million

Question 28

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

Answer 28

vasectomy

Question 29

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

Answer 29

glans penis

Question 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

Answer 30

erection

Question 31

Emission and ejaculation are dependent on what nervous system?

Answer 31

sympathetic

Question 32

relax the muscles around the urethra in men with symptoms from an enlarged prostate. Urine then flows more freely

Answer 32

alpha blockers

Question 33

These medications reduce the level of a certain form of testosterone (DHT). The prostate shrinks when less DHT is present, improving urine flow

Answer 33

5-alpha-reductase inhibitors

Question 34

Smooth muscle in the urinary bladder innervated by parasympathetic fibers responsible for involuntary contraction

Answer 34

detrusor muscle

Question 35

skeletal muscle WHICH IS under voluntary control. This can be used to consciously prevent urination even when involuntary controls are attempting to empty the bladder

Answer 35

external sphincter

Question 36

smooth muscle INVOLUNTARILY CONTROLLED with natural tone, and therefore prevents emptying of the bladder until the pressure in the main part of the bladder rises above a critical threshold

Answer 36

internal sphincter

Question 37

Drug class that is used to treat overactive bladder due to muscles contracting at the wrong time

Answer 37

anticholinergics