The Mammalian Male Reproductive System

Question 1

the three functions of the male reproductive system are

Answer 1

1. produce sperm
2. produce testosterone
3. ejaculate semen during copulation

Question 2

testes

Answer 2

male gonads

Question 3

sperm production occurs in the

Answer 3

seminiferous tubules

Question 4

The seminiferous tubules are located

Answer 4

within the testes

Question 5

Testosterone production occurs in the

Answer 5

interstitial cells

Question 6

interstitial cells are located

Answer 6

between the seminiferous tubules in the testes

Question 7

sustentacular cells

Answer 7

prevent the immune system from attacking the developing sperm by forming the blood-testis barrier in each seminiferous tubule

Question 8

Production of androgen binding protein occurs in the ________ when FSH binds to its receptors

Answer 8

sustentacular cells

Question 9

rete testis

Answer 9

transport sperm into the head of the epididymis

Question 10

the epididymis contains what 3 parts?

Answer 10

1. caput (head)
2. corpus (body)
3. cauda (tail)

Question 11

the caput of the epididymis

Answer 11

where fluid absorption occurs to increase the concentration of the sperm

Question 12

corpus of the epididymis

Answer 12

where substantial maturation of sperm occurs

Question 13

cauda of the epididymis

Answer 13

storage of sperm

Question 14

ejaculation occurs in the

Answer 14

vas deferens

Question 15

Sperm + Seminal Plasma =

Answer 15

semen

Question 16

ampulla

Answer 16

contracts to speed up ejaculation

Question 17

where is the ampulla found

Answer 17

prior to the juncture of the vas deferens and the urethra

Question 18

seminal vesicles (or vesicular glands) supply what 3 things

Answer 18

proteins, sugars, and citric acid

Question 19

prostate gland

Answer 19

cleanse and lubricate urethra, ass buffer and ions to activate sperm

Question 20

bulbourethral gland

Answer 20

cleanse and lubricate the urethra, supply a gelatinous plug

DON’T USE COWPER’S GLAND

Question 21

The 3 functions of the accessory fluids/seminal plasma are

Answer 21

1. neutralize residual acidity in the urethra
2. supply nutrients for the sperm
3. activate the sperm

Question 22

T or F: In some species, like the pig, they supply a gel that prevents the fertilization of the female by another male

Answer 22

true

Question 23

the glans pensis is filled with

Answer 23

Nerves that are stimulated during copulation which induces ejaculation

Question 24

the 2 penis types are

Answer 24

1. fibro-elastic
2. vascular

Question 25

the fibro-elastic penis contains a large amount of

Answer 25

connective tissue

Question 26

what 2 things control a fibro-elastic penis

Answer 26

1. retractor penis muscle
2. sigmoid flexure

Question 27

T or F: the fibro-elastic penis can change in diameter and length

Answer 27

False; the vascular penis changes in length and diameter

Question 28

the sigmoid flexure allows the penis to

Answer 28

come out of the sheath for copulation and ejaculation

Question 29

after ejaculation is complete, the retractor penis muscle

Answer 29

pulls the penis back into the sheath, while the sigmoid flexure returns to its original location

Question 30

the vascular penis contains

Answer 30

vascular tissue, with little to no connective tissue

Question 31

an erection occurs in the vascular penis when

Answer 31

it fills up with blood

Question 32

how many temperature regulations of the testes are there

Answer 32

4

Question 33

pampiniform plexus

Answer 33

responsible for cooling arterial blood going into the testes and warming venous blood, leaving the testes going back to the body (concurrent heat exchange)

Question 34

tunica dartos muscle

Answer 34

a thin layer of muscle that contracts when the testes are cold and relaxes when they are warm

Question 35

cremaster muscle

Answer 35

pulls the testes closer or farther from the body, depending upon the temperature. It also provides support to the testicles

Question 36

sweat glands

Answer 36

helps control the temperature by using evaporative cooling

Question 37

T or F: Not all species have these sweat glands

Answer 37

true

Question 38

where is the pampiniform plexus located

Answer 38

in the spermatic cord

Question 39

where is the tunica dartos muscle located

Answer 39

within the scrotum