Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
51 Cards in this Set
- Front
- Back
originate in the embryonic gut and migrate to the cortex of the embryonic ovary (urogenital ridge).
|
Germ cells (oogonium)
|
|
migrate to egg nests of primordial folliclesduring the development of the follicle in the fetus
|
Germ cells (oogonium)
|
|
during the Development of Follicle In the fetus the
Oocyte undergoes _______ thereby increasing in number. |
mitosis
|
|
All types of follicles are present in the ovary at any one time but developing or functional CL are dependent on the
|
stage of the estrous cycle
|
|
Development of follicles occurs randomly on the ovary except in what species
|
mare
|
|
What is reversed in the reproductive tract of the mare
|
medulla and the cortex
|
|
how many oocytes does the cow have at birth
|
100,000 oocytes
|
|
how many oocytes does an old cow have
|
2,500 oocytes
|
|
How many oocytes does a human have at birth
|
1 million oocytes
|
|
how many oocytes doe a post menopausal have??
|
1,000 oocytes
|
|
which hormones is not required for development of primary follicle
|
Gonadotropins
|
|
how many primordial follicles start development each day
|
One to three primordial follicles
|
|
what percent of all oocytes reach maturity and ovulate
|
less than 1%
|
|
primary follicles do not divide into other primary follicles, so what do they do?
|
they either mature or undergo atresia
|
|
Egg surrounded by a single layer of granulosa cells.
|
Primary Follicle (microscopic)
|
|
“Preantral” oocyte is surrounded by 2 or more layers of granulosa cells
|
Secondary Follicle (microscopic)
|
|
Fluid filled blister with an antrum
|
Tertiary Follicle (Antral)
|
|
3 layers of the tertiary follicle
|
theca externa, theca interna, granulosa cell layer
|
|
Fluid in the tertiary follicle
|
liquor folliculi
|
|
When do primordial follicles restart development again?
|
puberty, with the intiation of hormone signaling
|
|
The graffian follicle can be converted into either a _______or a___________
|
atretic follicle or a corpus hemmorrhagicum
|
|
the attretic follicle lacks what two hormones
|
LH and FSH
|
|
immature corpus luteum
|
corpus hemorrhagicum
|
|
order of follicular development
|
primary follicle
secondary follicle graffian follicle atretic follicle and start over or corpus hemorrhagicum corpus luteum corpus albican |
|
dense layer of connective tissue
|
corpus albuginea
|
|
After a woman has an ovarioectomy what is the possible source of eggs
|
bone marrow
|
|
which follicle undergoes an increase in the size of the follicle including the oocyte
|
secondary follicle
|
|
In follicular development the developing follicles are independent of gonadotropins until they become_________ at which point they are responsive to what hormone??
|
the secondary follicle; FSH
|
|
which 2 mm follicle takes on dependency for FSH / LH
|
tertiary follicle
|
|
how many days does it take to go from the antral to the preovulatory follicle
|
42 days or two cycles
|
|
dominant tertiary follicle of ~ 10 mm in diameter that goes on to ovulate
|
Graffian follicle
|
|
number of days it takes for Primordial follicle to become ovulatory
|
84 days
|
|
follicles grow in _____.
|
waves
|
|
how many cohorts are recruited per cycle
|
up to 3
|
|
What hormone from previous ovulation causes initiation of cohort recruitment
|
FSH surge
|
|
What hormone during luteal phase prevents the maturation of the graffian follicle
|
P4
|
|
What is the first follicle in cohort to develop LH recepters
|
graffian follicle
|
|
what is the only surge that will cause ovulation of the Graafian follicle
|
LH surge
|
|
which surge inhibits cAMP production allowing completion of the first meiotic division
|
LH surge
|
|
why do Subordinate follicles become atretic
|
insufficient FSH
|
|
what hormone is required for dominant follicles to grow
|
LH
|
|
A decrease in what two hormonal influence causes full maturation and eventual ovulation of follicles.
|
progesterone and gonadotropin
|
|
sends foot attachments into oocyte.
|
Corona radiata
|
|
Corona radiata produces what
|
oocyte inhibitor cAMP
|
|
which membrane has a blood ovary barrier
|
The basement membrane
|
|
responsible for the production of androgens under the control of LH
|
Theca interna
|
|
what cells produce testosterone that diffuse into granulosa cells which contain FSH receptors
|
theca cells
|
|
what hormone is produced by the theca cells
|
testosterone
|
|
what does the Binding of FSH cause
|
the synthesis of enzymes which are responsible for the conversion of testosterone to estradiol
|
|
where is inhibin and follicular fluid produced
|
granulosa cells
|
|
down regulates LH receptors and knocks out testosterone and estrogen production
|
Pre-ovulatory LH surge
|