Q 5: Male Reproductive System

Question 1

What supplies the testes with blood?

Answer 1

Gonadal arteries (can be

Question 2

What is the pathway for the gonadal arteries?

Answer 2

aorta–>deep inguinal ring–>inguinal canal–>superficial inguinal ring–>spermatic cord

Question 3

What does the ductus deferens do?

Answer 3

carries sperm up into the ejaculatory ducts from the testes

Question 4

What does the ductus deferens merge with?

Answer 4

the seminal vesicles

Question 5

What type of tissue/material is seminal vesicles?

Answer 5

glandular

Question 6

What is the ejaculatory duct?

Answer 6

portion of pathway from where the seminal vesicles and ductus deferens merge until it meets the prostatic urethra

two ejaculatory ducts exist (bilateral)

Question 7

Within which structure is the ejaculatory duct located?

Answer 7

prostate

Question 8

Why do older men take forever to pee?

Answer 8

prostate grows and pinches urethra(?)

Question 9

Where does the male reproductive system cease to be bilateral?

Answer 9

the urethra

Question 10

What is found within the prostate gland?

Answer 10

prostatic urethra and ejaculatory ducts

Question 11

what is the function of the bulbourethral glands (aka Cowper’s Glands)?

Answer 11

neutralize the acidity of urethra

produce less than 5% of semen

Question 12

what muscle does the prostate gland contain and why?

Answer 12

contains smooth muscle to help with ejaculation

Question 13

What function does the prostate gland have?

Answer 13

produces 30% of semen

neutralizes acidity of vagina

sm muscle contracts to ejaculate semen

Question 14

What is semen?

Answer 14

compilation of fluids contributed by the seminal vesicles, epididymis, prostate gland, and bulbourethral glands

Question 15

Where is the membranous urethra located?

Answer 15

between the prostatic urethra and the spongy urethra

Question 16

What type of innervation causes STIMULATION the male reproductive system?

Which nerve specifically?

Answer 16

somatic

pudendal nerve

Question 17

What type of innervation causes ERECTION (aiming for fire) of the male reproductive system?

What nerve specifically?

Answer 17

parasympathetic (lateral horns of S2-S4)

pelvic splanchnic nerves

Question 18

What type of innervation causes EMISSION (loading bullet) of the male reproductive system? What nerve specifically?

Answer 18

sympathetic, lumbar and sacral splanchnic nerves (

Question 19

What type of innervation causes EJACULATION of the male reproductive system? What nerve specifically?

Answer 19

somatic, pudendal nerve

Question 20

What does the central artery of the penis run through?

Answer 20

The corpus cavernosa (one artery on each side)

Question 21

What does the urethra run through?

Answer 21

The corpus spongiosum

Question 22

What happens to the dorsal penile veins during erection?

Answer 22

They are squeezed/pinched, allowing blood to remain in the penis for sex o clock

Question 23

What arteries carry blood to the penis during erection? In what structure of the penis are the arteries found?

Answer 23

central artery of the penis (no viagra needed baby), corpus cavernosa

Question 24

Where does the nerve impulse that initiates the movement of sperm into the ejaculatory duct originate? 
A. vagus nerve
B. T6
C. L1
D. S3
E. Preaortic plexus

Answer 24

C. L1

Question 25

1) During ERECTION, through which structures/plexuses are the signals carried through?
2) What nerve initiates the signal?
3) What type of innervation is it?
4) what chemical messenger is used?
5) what happens because of this chemical messenger?

Answer 25

1) (from pelvic splanchnic nerves to) pre-aortic plexus and prostatic plexus to penis

2) pelvic splanchnic nerves (S2-S4 cord level)
- –S2, S3, S4 keeps the penis off the floor

3) parasympathetic
4) NO (Nitric Oxide)
5) vasodilates deep penile arteries, blood fills corpus cav./spong. and dorsal penile veins get pinched

Question 26

1) During EMISSION, through which structures/plexuses are the signals carried through?
2) What nerve initiates the signal?
3) What type of innervation is it?
4) what chemical messenger is used?
5) what happens in result to the chemical messenger?

Answer 26

1) (from lumbar/sacral splanch. nerves) to pre-aortic plexuses to spermatic tubes
2) lumbar and sacral splanchnic nerves
3) sympathetic
4) NE (norepinephrine)
5) peristaltic contractions of the ductus deferens, seminal vesicles, prostatic smooth muscles & constriction of internal urethral sphincter

Question 27

What are the contents of seminal vesicles’ contributions to the semen?

Answer 27

produce 70% of volume of semen, fructose, proteins, enzymes

Question 28

What are the 3 regions of the urethra?

Answer 28

1) prostatic (within prostate)
2) membranous (between prostate and corpus spongiosum/shaft of penis)
3) spongy urethra (within shaft of penis/corpus spongiosum)

Question 29

What is the prostate gland’s homologous structure in females?

Answer 29

lesser vestibular glands

Question 30

what is the bulbourethral glands’ homologous structure in female’s?

Answer 30

bartholin’s glands (greater vestibular glands)

Question 31

What is the term for the head of the penis?

Answer 31

glans penis

Question 32

What nerve senses STIMULATION of the genitals?

What cord level does this nerve carry the stimulation signal to?

What type of innervation senses the stimuli?

Answer 32

pudendal nerve

pudendal nerve carries the stimuli to S2-S4

somatic (via somatic nerve receptors)

Question 33

1) During EJACULATION, what cord level does the impulse/signal arise from? is it ventral, dorsal, or lateral?
2) What nerve initiates the signal?
3) What type of innervation is it?
4) What happens in response to this signal?

Answer 33

1) S2-S4, ventral horn
2) Pudendal nerve
3) somatic
4) rhythmic contractions

Question 34

what muscles rhythmically contract in EJACULATION?

Answer 34

bulbospongiosus muscle (run along shaft of penis)

ischiocavernosus muscles (run back & laterally)