Steuctural & Functional Orginization of the Male Repoductive System

Question 1

what are the organs of the male reproductive system

Answer 1

testes

accessory sex organs

supporting structures

Question 2

the testes are a system of ducts that includes what

Answer 2

epididymis

ductus deferens

ejaculatory ducts

urethra

Question 3

the accessory sex gland includes what

Answer 3

seminal vesicles

prostate

bulbourethral glands

Question 4

the supporting structures includes what

Answer 4

scrotum and penis

Question 5

what separates the testes into internal compartments

Answer 5

lobules, a dense white fibrous capsule

Question 6

what produces sperm by a process called spermatogenesis and lines with spermatogenic cells

Answer 6

Seminiferous tubules

Question 7

what type of cells are Located between the developing sperm cells in the seminiferous tubules.

Answer 7

Sertoli Cells

Question 8

what release the hormone inhibin which regulates sperm production

Answer 8

Sertoli Cells

Question 9

support, protect, and nourish spermatogenic cells; phagocytize degenerating spermatogenic
cells; and secrete fluid for sperm transport

Answer 9

Sertoli Cells

Question 10

what is located between the seminiferous tubules and secrete the hormone testosterone

Answer 10

Leydig cells

Question 11

what hormone promotes the development of masculine characteristics

Answer 11

Androgen

Question 12

what promotes a mans libido

Answer 12

testosterone

Question 13

the production and survuval of sper is optimal at what temprature

Answer 13

2 - 3 degrees C normal body temp

Question 14

what is the process by which the sminiferous tubules of the testes produce sperm

Answer 14

spermatogenesis

Question 15

what are the 3 stages of spermatogenesis

Answer 15

Meiosis I

Meiosis II

Spermiogenesis

Question 16

from the time of onset of cell division in a spermatogonium until the sperm is released into the lumen of a seminiferous tubule is how many days

Answer 16

65-75

Question 17

spermatogonia contain how many diploid number of chromosomes

Answer 17

46

Question 18

during the interphase the precedes meiosis I what are the chromosomes doing

Answer 18

chromosomes replicates

Question 19

is there replication of DNA in Meiosis II

Answer 19

No

Question 20

what is the last stage of spermatogensis called

Answer 20

spermiogenesis

Question 21

what are the haploid cells formed during meiosis II called

Answer 21

spermatids

Question 22

sperm is produced at a rate of how much per day

Answer 22

300 million

Question 23

once sperm is ejaculated it does not survive more than how many hours in the female reproductive tract

Answer 23

48 hrs

Question 24

what are the major parts of the sperm

Answer 24

head and tail

Question 25

the head of the sperm contains what

Answer 25

Nuclear material (DNA) acrosome

Question 26

what is the acrosome of a sperm

Answer 26

a vesical that contains enzymes that aid in penetration into a second oocyte

Question 27

the tail of a sperm is divided into what 4 parts

Answer 27

neck middle piece principal piece end piece

Question 28

what part of the tail is the constricted region that is just behind the head of the sperm

Answer 28

neck

Question 29

what part of the sperm tail contains the mitochondria and provides ATP for locomotion

Answer 29

middle piece

Question 30

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

Answer 30

epididymis

Question 31

what is the site of sperm maturation, and sperm acquires motility and ability to fertilize a secondary oocyte

Answer 31

ductus epididymis

Question 32

what duct 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

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

Answer 33

Ductus deferens / vas deferens

Question 34

how are the ejaculatory ducts formed

Answer 34

by union of ductus deferens and seminal vesicles

Question 35

the ejaculatory ducts carry sperm to where

Answer 35

urethra

Question 36

where does the urethra pass through

Answer 36

the prostate, deep perineal muscles and peins

Question 37

what secrets most of the liquid portion of semen

Answer 37

accessory sex glands

Question 38

where are the seminal vesicles located

Answer 38

posterior to the base of urinary bladder and anterior to the rectum

Question 39

The seminal vesicles secrete an alkaline viscous fluid that contains what

Answer 39

fructose prostaglandins clotting proteins

Question 40

what is the fructose in the seminal vesicles used for

Answer 40

ATP production by sperm

Question 41

fluid secreted by the seminal vesicles constitutes how much of volume of semen

Answer 41

60%

Question 42

the prostate is a single doughnut shaped gland about what size

Answer 42

gold ball

Question 43

the size of the prostate at the age of 30 remains stable until what age

Answer 43

45years old

Question 44

The prostate secretes a milky, slightly acidic fluid at what pH

Answer 44

6.5

Question 45

the milky fluid secreted by the prostate contains what

Answer 45

citric acid

Question 46

the citric acid found in the milky slightly acidic fluid secreted by the prostate is used by sperm for ATP production via what cycle

Answer 46

Krebs cycle

Question 47

prostatic secretions make up what percentage of semen volume

Answer 47

25%

Question 48

paired bulbourethral glands are about the size of what

Answer 48

peas

Question 49

during sexual arousal the bulbourethral gland secretes what type of substance why

Answer 49

alkaline protect sperm by neutralizing acids from urine in the urethra

Question 50

semen is a mixture of sperm and secretions from what

Answer 50

seminal vesicles prostate bulbourethral gland

Question 51

what is the ratio of semen in a typical ejaculation

Answer 51

50 - 150 million sperm per milliliters

Question 52

what is the typical volume of seamen during a ejaculation

Answer 52

2.5 - 5 milliliters

Question 53

when the ratio of seamen per milliliters falls below what threshold is the male considered to be infertile

Answer 53

below 20 million

Question 54

what is the pH of semen

Answer 54

7.2 - 7.7

Question 55

what does the penis consit of

Answer 55

root body glans penis

Question 56

what are the two dorsolateral masses of the penis called

Answer 56

corpora cavernosa

Question 57

what is the smaller midventral mass of the penis called

Answer 57

spongiosum

Question 58

erections are what type of neuro impulses

Answer 58

parasympathetic

Question 59

in a erection Parasympathetic impulses cause release of neurotransmitters and what local hormones

Answer 59

gas nitric oxide

Question 60

Ejaculation, the powerful release of semen from the urethra to the exterior, is why type of reflex

Answer 60

sympathetic reflex

Question 61

at the onset of puberty neurosecretory cells in thehypothalamus increase the secrtion of what

Answer 61

gonadotropin- releasing hormone (GnRH)

Question 62

gonadotropin-releasing hormone (GnRH) stimulates the anterior pituitary to increase the secretion of what

Answer 62

luteinizing hormone (LH) Follicle-stimulating hormone (FSH)

Question 63

Luteninizing hormone stimulates leydig cells to secret what hormone

Answer 63

testosterone

Question 64

Testosterone is a steroid hormone that is synthesized from what and the priniciple androgen

Answer 64

cholesterol in the testes

Question 65

what kind of feed back system does testosterone to suppress leydig cells

Answer 65

negative feedback system

Question 66

In some target cells, such as those in the external genitals and prostate, an enzyme converts testosterone to another androgen called

Answer 66

dihydrotestosterone (DHT).

Question 67

FSH and testosterone act together to stimulate

Answer 67

spermatogenesis

Question 68

Once the degree of spermatogenesis required for male reproductive functions has been achieved, Sertoli cells release what to inhibit Follicle-stimulating hormone

Answer 68

inhibin

Question 69

what stimulates the male pattern of development of reproductive system ducts and the descent of the testes.

Answer 69

testosterone

Question 70

what stimulates development of the external genitals.

Answer 70

dihydrotestosterone (DHT).

Question 71

where is testosterone converted to estrogen in males

Answer 71

the brain

Question 72

At puberty what bring about development and enlargement of the male sex organs and the development of masculine secondary sexual characteristics.

Answer 72

testosterone and dihydrotestosterone (DHT).

Question 73

what contribute to male sexual behavior and spermatogenesis and to sex drive (libido) in both males and females

Answer 73

Androgens

Question 74

Androgens are what type of hormone

Answer 74

anabolic stimulate protein synthesis.