SELF EVALUATION - CHAPTER 14

TESTES AND ASSOCIATED STRUCTURES

1. Which one of the following cells lines the periphery of the seminiferous tubules and provides a “nurse” function for developing spermatozoa?

a.

b. Spermatid

c. Sertoli cells

d. MPS cells

2. The ductus deferens (vas deferens):

a. is not included in the spermatic cord.

b. is the same as the epididymis.

c. is a continuation of the duct system from the tail of the epididymis to the pelvic urethra.

d. is not present in all domestic males.

3. The scrotum is lined with:

a. the visceral layer of the vaginal tunic.

b. the parietal layer of the vaginal tunic.

DESCENT OF THE TESTES

4. A scrotal hernia exists when a loop of intestine:

a. descends to the scrotum within the spermatic cord.

b. descends to the scrotum in the vaginal cavity.

c. is in the peritoneal cavity.

d. occupies the pleural cavity.

5. The gubernaculum testis plays a role in:

a. spermatogenesis.

b. erection.

c. descent of the testicles during fetal development.

d. elevation of testicles to inguinal ring.

ACCESSORY SEX GLANDS AND SEMEN

6. Which one of the following hormones is found in seminal plasma, and is thought to assist fertilization by making cervical mucus more receptive to sperm and to facilitate sperm transport by contracting uterine smooth muscle?

a. Prostaglandins

b. Testosterone

c. Estrogen

d. FSH

7. Seminal plasma is:

a. the same as semen.

b. a component of blood.

c. a collective name for accessory sex gland secretions.

d. the fluid from the epididymides.

8. Which one of the following accessory sex glands would obstruct urine flow when it becomes enlarged?

a. Bulbourethral glands

b. Ampullae of the ducti deferentes

c. Vesicular glands

d. Prostate gland

PENIS AND PREPUCE

9. The bull has a large amount of erectile tissue relative to connective tissue, and greater enlargement is possible during erection than in the stallion, in which the ratio of erectile tissue to connective tissue is less.

a. True

b. False

0. A sigmoid flexure in the bull, ram, and boar is a characteristic of the erected penis.

a. True

b. False

11. A preputial diverticulum is present in the:

a. boar.

b. stallion.

c. ram.

d. dog.

MUSCLES OF MALE GENITALIA

.2. The muscles that pull the testes up against the external inguinal ring, particularly in cold weather, are the:

a. cremaster muscles.

b. ischiocavernosus muscles.

c. retractor penis muscles.

BLOOD AND NERVE SUPPLY

.3. The pampiniform plexus:

a. pampers the testicles.

b. assists warming of the testicles.

c. assists cooling of the testicles.

d. is a nerve network to the testicles.

SPERMATOGENESIS

.4. The maturation phase, whereby spermatids undergo nuclear and cytoplasmic changes and develop a tail, is known as:

a. spermatidosis.

b. spermiation.

c. spermatogenesis.

d. spermiogenesis.

15. Testosterone is produced by:

a. Leydig cells in response to stimulation by LH.

b. Sertoli cells in response to stimulation by FSH.

c. Leydig cells in response to stimulation by FSH.

d. Sertoli cells in response to stimulation by LH.

.6. Which one of the following is an,androgen?

a. Testosterone

b. Estrogen

c. LH

d. FSH

L7. The spermatogenic wave:

a. is a spectator performance at athletic events.

b. ensures a continuous supply of spermatozoa.

c. is an activity of the epididymis.

d. is a friendly acknowledgement.

8. Maturation and storage of spermatozoa occurs in the:

a. epididymis.

b. seminiferous tubules.

c. prostate gland.

d. urethra.

.9. Which one of the following is the principal androgen in the male?

a. Interstitial cell stimulating hormone

b. Testosterone

c. Follicle stimulating hormone

d. Cholesterol

:0. The function of luteinizing hormone in the male animal is to:

a. stimulate the production of estrogen by Sertoli cells.

b. stimulate spermatogenesis.

c. stimulate the production of testosterone by the interstitial cells (Leydig cells).

d. cool the testicle.

ERECTION

»1. An approximate blood pressure within the corpus cavernosum penis of the bull during coitus is:

a. 140 mm Hg.

b. THTM (too high to measure).

c. 1400 mm Hg.

d. about the same in mm Hg as Pike’s Peak in Colorado is high in feet (14,000) above sea level.

:2. Contraction of the ischiocavernosus muscle in the bull:

a. pulls the testis up against the external inguinal ring.

b. assists in emptying the urethra.

c. pulls the penis upward against the floor of the pelvis, which obstructs venous outflow, thereby assisting erection.

d. pulls the flaccid penis back into the prepuce.

MOUNTING AND INTROMISSION

13. Intromission is defined as:

a. emptying of sperm and fluids from the vasa deferentia and ampullae into the urethra along with seminal plasma.

b. a time-out between mounting and ejaculation.

c. introduction of the penis into the vagina and its maintenance therein during coitus.

d. the movement of urethral content toward the external urethral orifice.

EMISSION AND EJACULATION

14. Emission follows ejaculation.

a. True

b. False

FACTORS AFFECTING TESTICULAR FUNCTION

15. The degree of influence of photoperiod on testicular regression is the same in all animals.

a. True

b. False

REPRODUCTION IN THE AVIAN MALE

16. An intraabdominal location for avian testes is abnormal.

a. True

b. False

>7. Cooling of avian testes below body temperature is:

a. accomplished by their close proximity to the air sacs.

b. accomplished by a vascular arrangement similar to the pampiniform plexus.

c. not necessary for their functional integrity.

:8. The avian penis is also known as the:

a. malleus.

b. phallus.

c. incus.

d. organ.

19. Intromission is a reproductive component for:

a. all avian species.

b. cocks (male chickens) and toms (male turkeys).

c. drakes (male ducks) and ganders (male geese).

d. cocks, toms, drakes, and ganders.

0. When avian semen is inseminated, the spermatozoa:

a. are short lived (minutes).

b. perish after a one-time fertilization.

c. have a prolonged life in sperm storage glands of the female and persist at this location for the fertile period of the female.