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31 Cards in this Set

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Where are sperm produced?
in the seminiferous tubules of the testicles
What is the epidiymis? Where is it located? What is its function?
a highly coiled tube held in a covering on the exterior of the testicle. It concentrates, stores, transports and facilitates the maturation of sperm cells
What is the vas deferens? What empties into it? What does it lead into?
a larger tube that the epidiymis empties into. to lead to the outside of the body (but has to go through urethra first)
Where is testosterone produced? What are two names for those cells?
in the cells between the tubules. Leydig cells and interstitial cells
What is the free end of the penis called?
the glans penis
What stimulates the testicles to produce test.?
the hypothalmus to the anterior pitutiary, which then stimulates LH and FSH.
What effect does LH have on males?
it stimulates the Leydig cells to produce testosterone
What effect does FSH have on males?
stimulates cells in the seminiferous tubules to create and nourish developing sperm
What is sigmoind flexure? What does it allow?
the s-shaped curve of the penis. The extension of the penis
Where is the genetic material located on a sperm?
on the head
How/where does the sperm get its energy to move?
from the midpiece
What is the shape of an uterus? What does it do?
body and horns
nourishes growing fetus
expels fetus during birth
When does uteral attachment begin for sows, cows and mares?
sow - 13 days
cow - 22 days
mare - 37 days
Where is the site of fertiaization?
in the oviducts
What is the infundibulum?
a delicate, funnel shaped tissue at the end of the oviduct that "catches" the ovum at the time of ovulation
What hormones do the ovaries produce? What hormone does the CL produce?
estrogen
progesterone
Where is estrogen produced in the ovary?
in the cells lining the antrum
what is a follicle?
a fluid filled structure in the ovary that contains the egg
What is another name for a mature follicle?
Graafian follicle
Where does fertilization take place in cows and ewes? In gilts and mares?
cows and ewes - vagina
gilts and mares - cervix
Which hormones stimulate the development of the new follicle?
LH and FSH
What are the functions of estrogen?
mating behavior
uterine growth
prohibit GnRh release
Which hormone causes ovulation to occur?
LH
What are two other functions of LH at the time of ovulation?
CL formation
progesterone production
What are the functions of progesterone?
maintains pregnancy
mammary development
inhibits GnRH release
What is the difference between "estrus" and "estrous"?
"estrus" (heat) is the period of time when the female will accept the male for breeding. the estrous cycle is the cycle of ovulation
What is the length of the estrous cycle for cows, sows, ewes and mares?
cow - 21 days
sow - 21 days
mare - 21 days
ewe - 17 days
What is the length of gestation for a cow, sow, ewe and mare?
cow - 283
sow - 114
mare - 336
ewe - 147
When does uteral attachment begin for cows, sows and mares?
cows - 22
sows - 13
mares - 37
What does prostaglandin cause if there is not fertilization in the uterus?
regression of the CL
then progesterone goes down
What stimulates prostaglandin?
the uterus when there is no zygote