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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