Exam 1: Male Reproduction

Question 1

What drains the scrotum?

Answer 1

superficial inguinal lymph node

Question 2

What drains the testis?

Answer 2

Lumbar lymph nodes

Question 3

This structure is responsible for

countercurrent exchange in the testis (thermoregulation)

to keep the testis about 4C below core body temp

Answer 3

Pampiniform plexus

Question 4

This protects germ cells from damage

and prevents autoimmune response to sperm

Answer 4

Blood-Testis Barrier

Question 5

This structure functions in sperm maturation,

storage, and transit, and all of its actions are

androgen-dependent

Answer 5

Epididymis

Question 6

This type of penis, seen in horses, dogs, and cats,

increases in size due to blood engorgement

in the corpus cavernosum

Answer 6

Musculocavernous

Question 7

This type of penis, seen in cows, pigs, and camelids,

has a strong tunica albuginea which prevents increase

in diameter. It increases in legth by relaxation of

the retractor penis mm. and extension of the sigmoid flexure

Answer 7

Fibrous

Question 8

The processus urethralis is found on the penis of this species

Answer 8

RAM (sheep)

Question 9

Dogs have an ______ penis, which helps it

acheive erection to enter the female, then gets to full erection

by inflation of the bulbus glandis

Answer 9

OS penis

Question 10

The genetically determined threshold level of testosterone

is known as

Answer 10

libido

Question 11

The ejection of sperm from the epididymis

Answer 11

Emission

Question 12

The ejection of semen from the urethra

Answer 12

ejaculation

Question 13

These 2 factors are found in the acidic seminal fluid

Answer 13

B-Nerve Growth Factor

Ovulation Inducing Factor

Question 14

What is the path of the ejaculation reflex AFFerents?

Answer 14

Glans penis –> pudendal n.–> spinal cord

Question 15

What is the path of the ejaculation reflex EFFerents?

Answer 15

hypogastric n.–> muscles

Question 16

Sperm gain the ability to fertilize during transit

through the

Answer 16

epididymis

Question 17

Where is the functional sperm reservoir in females?

Answer 17

Isthmus of the uterine tube

near the uterotubal junction

Question 18

Biochemical non-morphological changes

that are required in the female tract before

sperm can fertilize is known as

Answer 18

Capacitation

Question 19

The acrosome reaction occurs when

sperm contacts the ______ ______

Answer 19

zona pellucida

Question 20

The fusion of sperm and the oocyte membrane is known as

Answer 20

acrosome reaction

Question 21

Sperm motility and enzymes (acrosine)

are required for _____ penetration

Answer 21

zonar

Question 22

When fusion of the postacrosomal sperm membrane

(equatorial region) and the _______ occurs,

gametes (DNA) can fuse together

Answer 22

oolemma

Question 23

The ______ _______ is the main block to polyspermy

Answer 23

zona pellucida

Question 24

_________ of the sperm are in the midpiece,

and are therefore entirely maternally derived

Answer 24

mitochondria

Question 25

In cows and most species, the zygote reaches the uterus in

about _____ days.

It takes longer in horses and dogs.

Answer 25

4

Question 26

How is tubal migration weird in the mare?

Answer 26

only fertilized zygotes are transported through the uterine tubes

and zygotes are responsible for transport by secreting PGF2a