Male repro

Question 1

Which of the following is false regarding the anatomy of the testes and epididymis?
A. The ductus deferens crosses ventral to the ureter and penetrates the dorsal prostate to insert on the prostatic urethra
B. The cremaster muscle is formed from the external abdominal oblique and functions to raise and lower the testes
C. The ductus deferens artery is a branch of the prostatic artery
D. The right testicular vein drains into the caudal vena cava and the left testicular vein drains into the left renal vein

Answer 1

B false
Cremaster muscle from INTERNAL oblique and occasionally the transversus abdominus –> inserts on spermatic fascia and travels along external surface of parietal vaginal tunic

Question 2

What is the function of the pampiniform plexus within the spermatic cord?

Answer 2

Network of veins wrapped around the testicular artery which provides a mechanism for countercurrent heat exchange

Question 3

Which of the following is true regarding the physiology of the testis?
A. Leydig cells are support the development and maturation of spermatozoa
B. Sertoli cells are stimulated by FSH from the anterior pituitary
C. Sertoli cells are responsible for producing testosterone
D. A dogs and cats accessory sex gland is the prostate

Answer 3

B true
Leydig cells: interstitial cells that produce testosterone
Sertoli = sustentacular = develop and mature spermatozoa
Dog prostate
Cat = prostate + bulbourethral

Question 4

What artery supplies the skin of the prepuce? The

Answer 4

skin = caudal superficial epigastric
Mucosa?= dorsal artery of penis and external pudendal

Question 5

What is the most common developmental abnormality of the male genitalia most frequently seen in Boston Terriers?

Answer 5

hypospadias

Question 6

Erection is essential for the penis to function during copulation in all species except exotics

Answer 6

False: dogs → the canine os penis facilitates vaginal entry without full erection and influences the urethral orifice orientation during intromission.

Question 7

Which corpora surrounds the urethral?

Answer 7

Corpus spongiosum

Question 8

what are the 3 layers of the scrotum

Answer 8

skin, tunica dartos, scrotal fascia

Question 9

what forms the blood-testis barrier?

Answer 9

basal junctions (tight jxns) of the seminiferous tubules with adjacent sertoli cells

Question 10

what are the 4 extrinsic muscle of the penis?

Answer 10

Retractor penis, ischiocavernosus, bulbospongiosus, ischiurethralis

Question 11

The autonomic nerve supply to the prostate gland is via the ________ and _____ nerves

Answer 11

pelvic and hypogastric
Pelvic = adrenergic = fluid movement
hypogastric = cholinergic = secretion

Question 12

Vascular supply: the prostatic arteries branches from the _____ ______ vessels
and continues… __ __ __

Answer 12

internal iliac –> internal pudendal (OR umbilical arteries) at the level of S2-S3.
The prostatic arteries divide into cranial, middle, and caudal branches –> dorsolateral surfaces, becoming subcapsular arteries, and supplying the glandular tissue.
–> ductus deferens artery

Question 13

T/F: Proposed range for the ratio of the normal prostate gland to body weight in mature adult dogs is 0.64 to 0.96 g per kilogram body weight.

Answer 13

True

Question 14

what is the age of onset of BPH in beagles?

Answer 14

glandular hyperplasia as early as 2-3 yrs of age (<4)

complex form in older dogs > 6 yr = cystic

Question 15

macroscopic appearance of BPH?

Answer 15

symmetrically enlarge, pain-free gland homogenous in consistency