Exam 1: Male Reproduction Flashcards
What drains the scrotum?
superficial inguinal lymph node
What drains the testis?
Lumbar lymph nodes
This structure is responsible for
countercurrent exchange in the testis (thermoregulation)
to keep the testis about 4C below core body temp
Pampiniform plexus
This protects germ cells from damage
and prevents autoimmune response to sperm
Blood-Testis Barrier
This structure functions in sperm maturation,
storage, and transit, and all of its actions are
androgen-dependent
Epididymis
This type of penis, seen in horses, dogs, and cats,
increases in size due to blood engorgement
in the corpus cavernosum
Musculocavernous
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
Fibrous
The processus urethralis is found on the penis of this species
RAM (sheep)
Dogs have an ______ penis, which helps it
acheive erection to enter the female, then gets to full erection
by inflation of the bulbus glandis
OS penis
The genetically determined threshold level of testosterone
is known as
libido
The ejection of sperm from the epididymis
Emission
The ejection of semen from the urethra
ejaculation
These 2 factors are found in the acidic seminal fluid
B-Nerve Growth Factor
Ovulation Inducing Factor
What is the path of the ejaculation reflex AFFerents?
Glans penis –> pudendal n.–> spinal cord
What is the path of the ejaculation reflex EFFerents?
hypogastric n.–> muscles
Sperm gain the ability to fertilize during transit
through the
epididymis
Where is the functional sperm reservoir in females?
Isthmus of the uterine tube
near the uterotubal junction
Biochemical non-morphological changes
that are required in the female tract before
sperm can fertilize is known as
Capacitation
The acrosome reaction occurs when
sperm contacts the ______ ______
zona pellucida
The fusion of sperm and the oocyte membrane is known as
acrosome reaction
Sperm motility and enzymes (acrosine)
are required for _____ penetration
zonar
When fusion of the postacrosomal sperm membrane
(equatorial region) and the _______ occurs,
gametes (DNA) can fuse together
oolemma
The ______ _______ is the main block to polyspermy
zona pellucida
_________ of the sperm are in the midpiece,
and are therefore entirely maternally derived
mitochondria
In cows and most species, the zygote reaches the uterus in
about _____ days.
It takes longer in horses and dogs.
4
How is tubal migration weird in the mare?
only fertilized zygotes are transported through the uterine tubes
and zygotes are responsible for transport by secreting PGF2a
