Male Reproductive Anatomy

Question 1

2 functions of the testis

Answer 1

Produce/transmission of spermatozoa. Production of reproductive androgen hormones.

Question 2

Spermatozoa

Answer 2

Male genes

Question 3

2 Compartments within the Testis

Answer 3

Seminiferous tubules and between the seminiferous tubules

Question 4

What is held within the seminiferous tubules?

Answer 4

Sertoli cells. Spermatogenesis, or sperm development, takes place

Question 5

What is held outside of the seminiferous tubules?

Answer 5

Leydig cells and androgens synthesized

Question 6

Spermatogonia

Answer 6

Developing sperm cell

Question 7

Function of the Sertoli cell

Answer 7

Moderates/control the production of sperm (spermatogenesis). All sertoli cells are linked by gap junctions.

Question 8

3 phases of Spermatogenesis

Answer 8

Mitotic Proliferation, Meiotic Division, Cytodifferentiation (spermiogenesis)

Question 9

What is Mitotic Proliferation

Answer 9

Diploid and genetically identical.

Question 10

What is Meiotic Proliferation

Answer 10

Generates genetic diversity with the exchange of genetic material. Produces Haploid Cells. 2 rounds

Question 11

What is produced in the first round of meiotic proliferation

Answer 11

Spermatocytes

Question 12

What is produced in the second round of meiotic proliferation

Answer 12

Spermatids

Question 13

Cytodifferentiation

Answer 13

Spermatogenesis. Change in morphology

Question 14

3 epilayers of the Seminiferous Tubules

Answer 14

Adlumenal compartment, Basal compartment, Interstitial compartment

Question 15

How is spermatogenesis coordinated

Answer 15

The sperm are developing at the same rate in a coordinated wave

Question 16

Function of the Leydig Cells

Answer 16

Produce the androgen testosterone

Question 17

Controls the ability to make sperm, become erect, produce accessory secretions, and initiate puberty

Answer 17

Dihydrotestosterone

Question 18

Hypothalamic-Pituitary Axis

Answer 18

GnRH produced/released in Hypothalamus. Sends GnRH to anterior pituitary. AP produced LH and FSH

Question 19

LH effect on male reproduction

Answer 19

LH stimulates leydig cells to produce testosterone and supports spermatogenesis

Question 20

FSH effect on male reproduction

Answer 20

FSH stimulates the production of androgen receptor proteins in the sertoli cells, which allows them to respond

Question 21

Boar taint

Answer 21

Testosterone making the meat taste weird

Question 22

Cremaster muscle

Answer 22

Pulls the testis up towards the body

Question 23

Pampiniform testis

Answer 23

The veins that wrap around the artery, taking the heat out of the artery to reach the testis at a much cooler temperature. Countercurrent temperature control

Question 24

Blood supply to the testis

Answer 24

Testicular artery, right and left testicular vein

Question 25

How long does the passage through the epididymis take?

Answer 25

10 days

Question 26

Epididymal Structure

Answer 26

Caput, Corpus, Cauda

Question 27

Epididymal Caput function

Answer 27

Head. Fluid from sertoli cells reabsorbed, sperm is concentrated.

Question 28

Epididymal Corpus function

Answer 28

Body. Modification of the environment and sperm mature

Question 29

Epididymal Cauda Funtion

Answer 29

Sperm Storage

Question 30

Epididymal Maturation in the Corpus

Answer 30

Condensation of nuclear chromatin. Depression of metabolic activity to prolong life. cAMP content of tail increases, allowing for motility

Question 31

What are sperm ejaculated in

Answer 31

Seminal plasma

Question 32

What produces seminal plasma

Answer 32

Accessory glands

Question 33

What are the Accessory glands

Answer 33

Prostate, seminal vesicle, ampulla, bulbourethral

Question 34

What determines the ejaculate volume?

Answer 34

Seminal plasma

Question 35

What does the Bulbourethral gland produce

Answer 35

Pre-ejaculate

Question 36

What accessory glands are absent in dogs

Answer 36

Ampulla and two seminal vesicles

Question 37

Two types of penises

Answer 37

Fibroelastic and musculovascular

Question 38

Animals that have the Fibroelastic Penis

Answer 38

Ram, bull, boar

Question 39

Erectile tissue of the fibroelastic penis

Answer 39

Corpus cavernosum and corpus spingeosum

Question 40

Animals that have the musculovascular penis

Answer 40

Stallion and human. Lacking sigmoid flexure

Question 41

Glans Penis

Answer 41

Highly specialized tip of the penis

Question 42

Male and Female Dog are "tied"

Answer 42

OS penis. Bulbus glandis forms the copulatory lock

Question 43

What is the OS penis

Answer 43

Bone within the glands penis