Chapter 28: Male Reproductive System

Question 1

What ar ethe primary sex organs of the male

Answer 1

testes

Question 2

What are the accessory organs of the male

Answer 2

set of ducts and tubules leading from the testes to the penis

Question 3

What is the organ of copulation?

Answer 3

penis

Question 4

_______ is a skin-covered sac that provides the testes with a cooler environment than body temperature

Answer 4

Scrotum

Question 5

At what temperature do sperm develop successfully ?

Answer 5

3 ^oC below normal body temperature

Question 6

What is the scrotum homologous to in the female

Answer 6

labia majora

Question 7

______ separates the two scrotal sacs

Answer 7

raphe

Question 8

What is the layer of smooth muscle that is part of the wall of the scrotum called

Answer 8

dartos muscle

Question 9

The spermatic cord originates at the _______ ______

Answer 9

inguinal canal

Question 10

What does the spermatic cord consist of?

Answer 10

• testicular artery
• pampiniform plexus
• cremaster muscle and fascia
• Autonomic nerves

Question 11

What structure within the spermatic cord is a branch of the abdominal aorta

Answer 11

Testicular artery

Question 12

What structure within the spermatic cord is a network of veins surrounding the testicular artery

Answer 12

pampinform plexus

Question 13

What layer of the spermatic cord is formed from muscle fiber extensions of the internal oblique muscle

Answer 13

cremaster muscle and fascia

Question 14

What structure within the spermatic cord travels with plexus and connect to the testes

Answer 14

Autonomic nerves

Question 15

What is the function of the testes

Answer 15

1. Production of sperm
2. Production and secretion of androgens (male sex hormones)

Question 16

Each testis is covered anteriorly by a serous membrane called:

Answer 16

tunica vaginalis

Question 17

The tunica vaginalis has an outer ______ layer and an inner ____ layer

Answer 17

parietal; visceral

Question 18

The thick whitish fibrous capsule covering the testis is called:

Answer 18

tunica albuginea

Question 19

The tunica albuginea projects into the interior of the testis as the _________ ______ through which blood vessels, lymphatic vessels, and some nerves enter and leave the testis

Answer 19

mediastinum testis

Question 20

The tunica albuginea projects internally into the testes to form _____

Answer 20

septa

Question 21

How many lobules can septa subdivide into?

Answer 21

about 250

Question 22

Each lobule contains (one/two/three/four/five) convoluted ________ _______

Answer 22

four; seminiferous tubules

Question 23

What types of cells do seminiferous tubules contain?

Answer 23

1. Sustentacular cells
2. Spermatogonia

Question 24

Name this seminiferous tubule cell:

nondividing support cells that assist with sperm development; connected to each other by tight junctions and form the blood-testis barrier

Answer 24

sustentacular cells

Question 25

**Name this seminiferous tubule cell:** a population of dividing germ cells that continuously produce sperm beginning at puberty

Answer 25

Spermatogonia

Question 26

Spaces external to an in between seminiferous tubules is:

Answer 26

interstitial space

Question 27

What resides in interstitial space and what do they do?

Answer 27

Interstitial cells and they produce hormones called androgens

Question 28

List the ducts of the male reproductive system

Answer 28

1. Ductus deferens 2. Ampulla 3. Ejaculatory duct 4. Urethra 5. Epididymis 6. Ducts within testes 1. Rete testis 2. Efferent ductules

Question 29

**Name this duct within testis:** meshwork of interconnected channels in the mediastinum

Answer 29

Rete testis

Question 30

**Name this duct within testis:** Receive sperm from seminiferous tubules

Answer 30

Rete testis

Question 31

**Name this duct within testis:** Channels merge to form efferent ductules

Answer 31

Rete testis

Question 32

**Name this duct within testis:** Number 12-15

Answer 32

Efferent ductules

Question 33

**Name this duct within testis:** has ciliated cells that propels sperm

Answer 33

efferent ductules

Question 34

**Name this duct within testis:** Connects rete testis to epididymis

Answer 34

Efferent ductules

Question 35

This structure us on the posterosuperior surface of the testes

Answer 35

epididymis

Question 36

What are the three regions of the epididymis

Answer 36

head, body, tail

Question 37

How long is the duct of the epididymis

Answer 37

4 to 5 meters long

Question 38

What is the function of the duct of the epididymis?

Answer 38

transports the sperm

Question 39

What is the function of the epididymis

Answer 39

Storage and maturation of sperm

Question 40

Sperm leaves the epididymis and enters the:

Answer 40

ductus deferens

Question 41

As the ductus deferens approaches the prostate glands, it enlarges to form the :

Answer 41

ampulla

Question 42

immediately prior to ejaculation peristalsis moves sperm from tail of ______ to \_\_\_\_\_\_\_

Answer 42

epididymis; ampulla

Question 43

The ampulla unites with the proximal portion of the seminal vesicle to form the:

Answer 43

ejaculatory duct

Question 44

The ejaculatory duct is located:

Answer 44

within the prostate gland

Question 45

The ejaculatory duct conducts sperm from the ductus deferens to the:

Answer 45

prostatic urethra

Question 46

The ejaculatory duct mixes sperm with ______ \_\_\_\_ prior to ejaculation

Answer 46

seminal fluid

Question 47

What are the three parts to the make urethra?

Answer 47

1. prostatic urethra 2. membranous urethra 3. spongy urethra

Question 48

What three glands (accessory glands) secrete seminal fluids to mix wth sperm to create semen?

Answer 48

1. Seminal vesicles 2. Prostate glands 3. Bulbourethral glands

Question 49

What is the purpose of seminal fluids mixing with sperm

Answer 49

to nourish the sperm and neutralize the acidity of the vagina

Question 50

Secrete a viscous whitish-yellow, alkaline seminal fluid

Answer 50

Seminal vesicles

Question 51

What makes up the seminal fluid in the seminal vesicles? and why?

Answer 51

* Fructose to nourish sperm * Prostaglandins to facilitate sperm entry into the uterus * Bicarbonate that buffers the fluid

Question 52

What does the prostate gland do?

Answer 52

Produces substances that are secreted directly into the prostatic urethra

Question 53

What makes up prostatic secretion? and why?

Answer 53

* citric acid for sperm nutrients * seminalplasmin (antibacterial) * Prostatic-specific antigen [PSA] which is an enzyme that helps liquify semen

Question 54

Mucin is secreted from _these glands_ and enters the spongy urethra at the base of the penis

Answer 54

Bulbourethral glands

Question 55

What gland does pre-ejaculation come from

Answer 55

bulbourethral glands

Question 56

What do mucin secretions (pre-ejaculate) do?

Answer 56

neutralizes fluid in urethra & flushes urethra

Question 57

Seminal fluid from the three accessory glands combines with sperm from testes to make:

Answer 57

semen

Question 58

How much semen in volume comes out when ejaculating and how many sperms are contained

Answer 58

3-5 mL and 200-500 million sperm

Question 59

The penis and the scrotum form:

Answer 59

external genitalia

Question 60

Internally, the attached portion of the penis is the _______ forming both the ____ and the _____ of the penis

Answer 60

root; bulb; crura

Question 61

The elongated portion of the penis is the:

Answer 61

shaft

Question 62

The tip of the penis is the \_\_\_\_\_, which surrounds the ______ \_\_\_\_\_\_\_ \_\_\_\_\_\_\_.

Answer 62

glans; external urethral orifice

Question 63

Foreskin =

Answer 63

prepuce

Question 64

The shaft of the penis is comprised of three parallel cylindrical erectile bodies:

Answer 64

1. Corpora cavernosa 2. Corpus spongiosum 3. Distal end of corpus spongiosum within the glans