Unit 4 Male Reproductive

Question 1

male reproductive function

Answer 1

1. produce male hormones and gametes

2. transport viable gametes to female tract

Question 2

male reproductive components

Answer 2

testes
genital ducts
accessory glands
penis

Question 3

testes structure

Answer 3

tunica albuginea
mediastinum testis
lobules containing 2-4 seminiferous tubules

Question 4

seminiferous tubules

Answer 4

spermatogonia cells

sertoli cells

Question 5

spermatogonia cells

Answer 5

1. spermatogonia
   a. type A – stem cells
   b. type B – differentiate into primary spermatocytes
   c. rest on basal lamina
2. spermatocytes – divide by meiosis to produce spermatids
3. spermatids – undergo spermiogenesis to form mature spermatozoa released into lumen of tubule

Question 6

Sertoli cells (aka sustentacular or nursing cells)

Answer 6

1. rest on basal lamina
2. extend through width of tubule
3. join together to form blood-testis barrier, creating basal compartment for spermatogonia and adluminal compartment for developing gametes

Question 7

Sertoli cell secretions

Answer 7

androgen binding protein (ABP)
inhibin
MIS (mullerian inhibiting substance)

Question 8

ABP

Answer 8

increases local concentration of testosterone

Question 9

inhibin

Answer 9

turns off FSH release

Question 10

MIS (mullerian inhibiting substance)

Answer 10

causes regression of Müllerian ducts, which would otherwise differentiate into the uterus and fallopian tubes.

Question 11

testicular interstitial tissue

Answer 11

loose connective tissue

Leydig cells or interstitial cells of testes

Question 12

leydig cells

Answer 12

steroid secreting cells

stimulated by LH to secrete testosterone

Question 13

testicular ducts

Answer 13

tubuli recti
rete testis
efferent ductules

Question 14

efferent ductules

Answer 14

1. 10-20 ducts
2. connect rete testis to epididymis
3. Alternating
4. ciliated and nonciliated cells move sperm to epididymis

Question 15

male excretory genital ducts

Answer 15

epididymis

ductus deferens

Question 16

epididymis

Answer 16

single tube

lined with pseudostratified columnar epithelium with stereocilia

Question 17

ductus deferens

Answer 17

thick muscular wall
joins with ducts from seminal vesicles to form ejaculatory duct
empties into prostatic urethra

Question 18

accessory glands

Answer 18

seminal vesicles
prostate
bulbourethral glands

Question 19

seminal vesicles

Answer 19

1. paired glands, Produces about 65-70% of the semen
2. pseudostratified columnar epithelium
3. secretion rich in fructose – source of energy for sperm

Question 20

prostate

Answer 20

1. single midline structure containing 30-50 glands
2. empties into prostatic urethra
3. prostatic concretions increase with age
4. secretion rich in lipids, proteolytic enzymes, acid phosphatase
5. produces about 25-30% of the semen

Question 21

bulbourethral glands

Answer 21

aka Cowper’s glands

1. Produces about 5-10% of the semen
2. paired glands
3. empty into membranous urethra
4. secrete mucous

Question 22

penis

Answer 22

urethra

erectile tissue

Question 23

erectile tissue

Answer 23

paired corpora cavernosa

corpus spongiosum around urethra