19-2

Question 1

Testes is a system of ducts which include:

Answer 1

1. epididymis
2. ductus deferens
3. ejaculatory ducts
4. urethra

Question 2

Accessory sex glands include:

Answer 2

1. seminal vesicles
2. prostate
3. bulbourethral glands

Question 3

several supporting structures include:

Answer 3

1. scrotum
2. penis

Question 4

what are paired oval glands that develop and produce sperm and secrete hormones.

Answer 4

Testes

Question 5

Dense white fibrous capsule that extends inward and divides each testis into internal compartments.

Answer 5

Lobules

Question 6

Sperm are transported and stored, helped to mature, and conveyed to the exterior by…

Answer 6

a system of ducts

Question 7

Semen contains:

Answer 7

• sperm
• secretions from accessory sex glands

Question 8

what is lined with spermatogenic cells, and produces sperm?

Answer 8

Seminiferous tubules

Question 9

• Located between the developing sperm cells in the seminiferous tubules
• Support, protect, and nourish spermatogenic cells
• phagocytize degenerating spermatogenic cells
• Secrete fluid for sperm transport
• release of the hormone inhibin, which regulate sperm production

Answer 9

Sertoli Cells

Question 10

Located between the seminiferous tubules are clusters of Leydig cells. These cells secrete the hormone testosterone.

Answer 10

Leydig cells

Question 11

Hormone that promotes the development of masculine characteristics.

Answer 11

Androgen

Question 12

Promotes a man’s libido (sex drive).

Answer 12

Testosterone

Question 13

what is a pouch that supports the testes; it consists of loose skin, superficial fascia, and smooth muscle.

Answer 13

Scrotum

Question 14

what divides the scrotum into two sacs, each containing a single testis?

Answer 14

Septum

Question 15

The production and survival of sperm is optimal at what temperature below normal body temperature?

Answer 15

2-3° C

Question 16

process by which the seminiferous tubules of the testes produce sperm

Answer 16

Spermatogenesis

Question 17

3 stages of Spermatogenesis

Answer 17

1. meiosis I
2. meiosis II
3. spermiogenesis

Question 18

In sexual reproduction, an organism results from the fusion of

Answer 18

2 different gametes, one from each parent

Question 19

Spermatogenesis begins during…

Answer 19

puberty

Question 20

The time from cell division in a spermatogonium until sperm are re-leased into the lumen is…

Answer 20

65 - 75 days

Question 21

During which stage do chromosomes replicate?

Answer 21

Meiosis I

Question 22

During what stage is no further replication of DNA?

Answer 22

Meiosis II

Question 23

How many sperm are produced per day?

Answer 23

300 million per day

Question 24

Once ejaculated, most sperm do not survive more than…

Answer 24

48 hours

Question 25

major parts of a sperm cell are…

Answer 25

head and the tail

Question 26

The sperm head contains:

Answer 26

* nuclear material (DNA) * acrosome * vesicle containing enzymes

Question 27

The tail of a sperm cell includes 4 parts:

Answer 27

1. neck 2. middle piece 3. principal piece 4. end piece

Question 28

what piece of the tail contains mitochondria that provide ATP for locomotion?

Answer 28

middle piece

Question 29

which piece is the longest portion of the tail?

Answer 29

principal piece

Question 30

is a comma-shaped organ that lies along the posterior border of the testis

Answer 30

epididymis

Question 31

where is the site of sperm maturation?

Answer 31

ductus epididymis

Question 32

stores sperm and helps propel them during sexual arousal by peristaltic contraction of its smooth muscle into the ductus vas deferens.

Answer 32

ductus epididymis

Question 33

Sperm may remain in storage in the ductus epididymis for…

Answer 33

several months

Question 34

what ascends along the posterior border of the epididymis and penetrates the inguinal canal, a passageway in the front abdominal wall.

Answer 34

ductus deferens

Question 35

The ductus deferens has how many layers of muscle?

Answer 35

3

Question 36

The ductus deferens stores sperm, which can remain viable for up to how long?

Answer 36

several months

Question 37

what conveys sperm from the epididymis toward the urethra during sexual arousal by peristaltic contractions of the muscular coat?

Answer 37

ductus deferens

Question 38

what is formed by the union of the ductus deferens and the seminal vesicles?

Question 39

In the male, the urethra passes through the…

Answer 39

prostate, deep perineal muscles and penis

Question 40

what secretes most of the liquid portion of semen?

Answer 40

Accessory sex glands

Question 41

what are pouch-like structures, lying posterior to the base of the urinary bladder and anterior to the rectum?

Answer 41

Seminal vesicles

Question 42

Seminal vesicles secrete what fluid? Which contains what?

Answer 42

* an alkaline, viscous fluid * fructose, prostaglandins, and clotting proteins

Question 43

fructose is used for what by sperm?

Answer 43

ATP production

Question 44

Prostaglandins help sperm with what?

Answer 44

motility and viability

Question 45

Clotting proteins help semen _______ after ejaculation

Answer 45

coagulate

Question 46

Fluid secreted by the seminal vesicles normally constitutes about what % of the volume of semen?

Answer 46

60%

Question 47

The prostate secretes what type of fluid?

Answer 47

milky, slightly acidic fluid

Question 48

Prostatic secretions make up what % of the volume of semen?

Answer 48

25%

Question 49

During sexual arousal what secretes an alkaline substance into the urethra that protects the passing sperm by neutralizing acids from urine in the urethra?

Answer 49

bulbourethral glands

Question 50

what secretes mucus that lubricates the end of the penis and the lining of the urethra, thereby decreasing the number of sperm damaged during ejaculation?

Answer 50

Bulbourethral glands

Question 51

semen has a slightly alkaline pH of

Answer 51

7.2 to 7.7

Question 52

What gives semen its milky white color?

Answer 52

prostatic secretions

Question 53

What makes semen sticky?

Answer 53

fluids from the seminal vesicles and bulbourethral glands

Question 54

Penis consists of 3 parts

Answer 54

1. root 2. body 3. glans penis

Question 55

The 2 dorsolateral masses of tissue in the penis are called?

Answer 55

corpora cavernosa penis

Question 56

The smaller midventral mass of tissue in the penis, that contains the urethra…

Answer 56

corpus spongiosum

Question 57

foreskin is also called

Answer 57

prepuce

Question 58

Erection is parasympathetic or sympathetic?

Answer 58

parasympathetic

Question 59

Ejaculation is parasympathetic or sympathetic?

Answer 59

sympathetic

Question 60

At the onset of puberty, neurosecretory cells in the hypothalamus increase their secretion of what hormone?

Answer 60

gonadotropin-releasing hormone (GnRH).

Question 61

GnRH stimulates the anterior pituitary to increase its secretion of what 2 hormones?

Answer 61

1. luteinizing hormone (LH) 2. follicle-stimulating hormone (FSH)

Question 62

LH stimulates what cells? To secrete what hormone?

Answer 62

* Leydig cells * Testosterone

Question 63

FSH and testosterone act together to stimulate…?

Answer 63

spermatogenesis

Question 64

Sertoli cells release what hormone?

Answer 64

Inhibin

Question 65

what hormone stimulates the development of reproductive system ducts and descent of testes?

Answer 65

Testosterone

Question 66

what hormone stimulates the development of external genitals?

Answer 66

Dihydrotestosterone (DHT)