Chapter 3 (Male Reproductive Tract)

Question 1

What are the 3 functions of the male reproductive tract

Answer 1

1. produce sperm
2. produce hormones (testosterone)
3. delivery of gamete (ejaculation)

Question 2

Testicles try to stay (temp) cooler than the body

Answer 2

3-6 degrees Celsius

Question 3

Cryptorchidism

Answer 3

when the testicles stay in the body cavity which results in sperm being fertile

Question 4

Sperm are finished in the ___

Answer 4

epididymis

Question 5

Cremaster muscle

Answer 5

a striated muscle (short term contraction)

for fight or flight situation, brings testicles close for short periods

Question 6

Testicular artery

Answer 6

brings blood to the testicles

Question 7

Ductus deferens

Answer 7

takes sperm from the epididymis into the accessories (for ejaculation)

Question 8

Parietal vaginal tunic

Answer 8

two smooth muscles attached to one another that leads to less friction and free moving testicles within the scrotum

Question 9

Dartos muscle

Answer 9

smooth muscle (longterm contractions)
brings testicles close to the body for long periods of time (temperature control)

Question 10

What are the bundle of veins in the testicles called

Answer 10

Pampiniform plexus

Question 11

What is the muscle used to bring the testicles close during fight or flight situations

Answer 11

Cremaster muscle

Question 12

What is the muscle used to bring the testicles close during cold temperatures

Answer 12

Dartos muscle

Question 13

What does the retractor penis muscle do in cows

Answer 13

it contracts the penis into a sigmoid fixture (S) shape

Question 14

Which two species has a vascularized penis

Answer 14

Stallion and dog

Question 15

What is unique about a boars ejaculation

Answer 15

since they produce a great amount of ejaculate, they produce a think gel fraction to serve as a plug to keep it all in

Question 16

4 ways to keep the testicles cool

Answer 16

1. heat dissipation through artery surface area
2. lowered blood pressure in testicles
3. scrotum skin
4. dartos muscle

Question 17

The dissipation of heat from the blood in the testicles is dependent upon ___

Answer 17

surface area
(more surface area = more heat dissipated)

Question 18

The skin of the scrotum contains ___ which are sensitive to temperature changes

Answer 18

thermo sensitive neurons

Question 19

(T/F) Breathing helps cool down the body

Answer 19

True

Question 20

The skin of the scrotum also has many ___ to help keep the testicles cool

Answer 20

sweat glands