Male Reproductive Anatomy Flashcards Preview

Theriogenology > Male Reproductive Anatomy > Flashcards

Flashcards in Male Reproductive Anatomy Deck (46):
1

Where is sperm stored?

In the tail of the epididymis.

2

What provides metabolic substrate to the sperm?

Accessory sex glands

3

What are the 4 accessory sex glands?

Ampullae
Vesicular glands
Prostate gland
Bulbourethral glands

4

What accessory sex gland is missing in the boar?

Ampullae

5

What 2 accessory sex glands are missing from the tom?

Ampullae and vesicular gland

6

What accessory sex glands are present in the dog?

Just a prostate

7

How is the temperature in the testis controlled?

Veins and arteries passing in close proximity in the pampiniform plexus allows heat exchange from the arteries to the cooler veins.

8

What does the spermatic cord contain?

Vasculature, lymphatics and neural connections and the cremaster muscle.

9

What 3 things occur in the excurrent duct system?

Final maturation of sperm
Storage
Delivery to pelvic urethra

10

What 3 structures comprise the excurrent duct system?

Efferent ducts
Epididymal duct
Ductus deferens

11

What is the seminal plasma?

Liquid, non-cellular portion of semen

12

What produces the seminal plasma?

The epididymus and the accessory sex glands

13

What are 2 major qualities of a fibroelastic penis?

Limited erectile tissue
Sigmoid flexure

14

What is the major characteristic of a musculovascular penis?

Large corporal sinusoids

15

What 3 species have a fibroelastic penis?

Bulls
Boars
Rams

16

What 3 species have a musculovascular penis?

Stallions
Dogs
Men

17

What is unique about a boar's penis?

It's corkescrew

18

What is unique about a ram and stallion penis?

The urethral process

19

What is unique about a dog's penis?

The os penis

20

What special feature does an alpaca penis have?

The cartilagenous process

21

What does a cat penis have that no other species has?

Penile spines

22

What are 3 endocrine requirements for spermatogenesis?

Enough GnRH
FSH and LH secretion from the anterior pituitary
Testosterone and estrogen

23

What do the Leydig cells do (2 things)?

Have LH receptors
Produce progesterone/testosterone

24

What do the Sertoli cells do (3 things)?

Have FSH receptors
Convert testosterone to estradiol
Produce inhibin

25

What does LH do?

Stimulates Leydig cells to produce testosterone

26

What does FSH do?

Stimulates Sertoli cells to begin spermatogenesis and convert testosterone to estradiol

27

What systemic effect does testosterone have?

Negative feedback for GnRH (prolongs LH secretion)

28

What does inhibin do?

Supresses FSH receptors on Sertoli cells

29

What are the 4 stages of spermatogenesis?

Spermatogonia
Primary Spermatophytes
Secondary Spermatophytes
Spermatids

30

Where does spermatogensis take place?

In the seminiferous tubules

31

How many spermatids can one spermatogonia produce?

Up to 256

32

What is the differentiation phase?

When spermiogenesis occurs.

33

What happens in the golgi phase?

Acrosomic vesicle formation

34

What happens during the cap phase?

Acrosomic vesicle spreads over the nucleus

35

What happens during the acrosomal phase?

Elongation of the nucleus and cytoplasm.

36

What occurs during the maturation phase?

Final assembly to form a spermatozoon.

37

What are the 4 parts that make up the differentiation phase?

Golgi Phase
Cap Phase
Acrosomal Phase
Maturation Phase

38

What 3 things are in the head of a spermatozoa?

Nucleus
Acrosome
Postnuclear cap

39

What 3 pieces make up the tail of a sperm?

Middle piece
Principal piece
Terminal piece

40

Which piece of the tail contains the mitochondria?

The middle piece

41

What is the duration of spermatogenesis of a bull?

61 days

42

What is the duration of spermatogenesis of a ram?

47 days

43

What is the duration of spermatogenesis of a boar?

39 days

44

What is the duration of spermatogenesis of a stallion?

55 days

45

What 3 hormones are released in pulses every few hours?

GnRH
LH
Testosterone

46

What hormone is released in a pulse with a longer duration?

FSH