Male Reproductive System

Question 1

What makes up the duct system in males?

Answer 1

Epidiymis
Ductus deferens
Urethra
Ejaculatory duct

Question 2

What are the accessory organs?

Answer 2

Seminal glands
Prostate gland
Bulbourethral glands

Question 3

What makes up the external genitelia?

Answer 3

Penis
Scrotum
Testes

Question 4

How are the testicles connected to trunk?

Answer 4

Spermatic cord

Question 5

What covers the testes?

Answer 5

Tunica albuginea: capsule that surrounds each testicle

Septa: extensions of the capsule that extend into the testis and divide it into lobules

Question 6

What are seminiferous tubules? Where are they located?

Answer 6

They are found in each lobule, each lobule has 1 to 4 seminiferous tubules.

They are tightly coiled structures.

Question 7

What is the function of the seminiferous tubules?

Answer 7

Form sperm and empty sperm into the rete testes.

Question 8

Which cells produce androgens (testosterone)?

Answer 8

Interstitial cells

Question 9

What is the function of the duct system?

Answer 9

To conduct sperm and semen

Question 10

What is the location of the epididymis?

Answer 10

Posterior lateral side of the testis

Question 11

What is the function of the epididymis?

Answer 11

To store immature sperm and allow sperm to mature.

Question 12

What happens during ejaculation?

Answer 12

Sperm is propelled to the ductus deferens.

Question 13

What does the ductus deferens consist of?

Answer 13

Ampulla: end of the ductus, empties into ejaculatory duct
Ejaculatory duct: passes through prostate to merge with urethra

Question 14

What is the function of the ductus deferens?

Answer 14

Move sperm by peristalsis into urethra

Question 15

What is the function of the urethra?

Answer 15

To carry both urine and sperm

Question 16

What are the regions of the urethra?

Answer 16

Spongy, Prostatic, Membranous

Question 17

What happens to the urethra during ejaculation?

Answer 17

The internal urethra sphincter closes

Question 18

Why does the internal urethra sphincter close during ejaculation?

Answer 18

To prevent urine from passing into urethra
To prevent sperm from entering the urinary bladder

Question 19

Where are the seminal vesicles located?

Answer 19

At the base of the bladder (posterior end of bladder)

Question 20

What does the yellowish fluid that is produced by the seminal vesicles consist of?

Answer 20

Fructose
Vitamin C
Prostaglandins
Seminal Plasmin

Question 21

What is the function of the urethra?

Answer 21

To carry sperm and urine and secrete milky fluid which mobilises sperm

Question 22

What are the bulbourethral glands?

Answer 22

Pea-sized glands located inferior to the prostate

Question 23

What is the function of the bulbourethral glands?

Answer 23

To produce clear mucus which is essential in the process of lubrication

Question 24

What is the function of the clear mucus that is produced from the bulbourethral glands?

Answer 24

Cleanses spongy urethra
Serves as lubricant

Question 25

What is semen a mixture of?

Answer 25

A mixture of sperm and accessory gland secretions

Question 26

What are the functions of the different components of semen?

Answer 26

Liquid portion: acts as a transport medium to dilute sperm Fructose: provides energy for sperm cells Alkalinity of semen neutralises acidic environment of vagina

Question 27

What is the function of prostaglandins in semen?

Answer 27

Prostaglandins: decrease viscosity of mucus, stimulate reverse peristalsis, facilitate movement of sperm into female reproductive tract.

Question 28

What hormone does the prostate release?

Answer 28

Relaxin to enhance sperm mobility

Question 29

What is the function of seminal plasmin?

Answer 29

Antibiotic that destroys certain bacteria

Question 30

How many ml of semen are ejaculated?

Answer 30

2 to 5, each containing 50 to 130 million sperm cells

Question 31

Why is the scrotum outside of the body?

Answer 31

To maintain a low temperature of around 35oC so that the sperm can be viable

Question 32

What are the different regions of the penis?

Answer 32

Shaft Glans penis Prepuce

Question 33

When does erection occur?

Answer 33

Occurs when the erectile penis fills with blood during sexual excitement

Question 34

What is the function of the male reproductive system?

Answer 34

Produce sperm and testosterone

Question 35

What is the function of testosterone?

Answer 35

To stimulate reproductive organ development Cause secondary sex characteristics

Question 36

What happens during sexual arousal?

Answer 36

Parasympathetic reflex promotes the release of nitric oxide which causes erectile tissue to fill up with blood. Expansion of the corpora cavernosa Enlargement and stiffening of penis due to engorgement of erectile tissue with blood

Question 37

What is the function of corpus spongiosum during ejaculation?

Answer 37

To keep the urethra open

Question 38

What is ejaculation?

Answer 38

Smooth muscles in the walls of the ductus deferens create peristaltic waves to squeeze sperm forward.

Question 39

What is impotence?

Answer 39

Inability to attain an erection, parasympathetic nerves release little to no nitric oxide.