Flashcards in kumari chpt 2 Deck (41):
what are the 3 layers of hte graafian follicle
when is oogenesis initiated in the female?
during fetal development
what is oogenesis?
prenatal phase of growth and differentiation
-the process by whihc female gamete are genereated
what is folliculogenesis?
differentiation in the prepubertal phase
what is folliculogenesis and oogensis?
differentiation in the pubertal phase
oogenesis leads to the formation of a haploid or diploid cell?
what stage are oocytes arrested in?
-(dictyate stage of meiosis)
what initiates growth of primordial folllicles?
do all follicles become graafian follicles?
what is the cause of follicular atresia and when does it happen?
- lack of support signal
-can occur at any step during folliculogenesis
what is the time required to complete follicular growth?
~10 estrous cycles
do all follicles follow the same pattern of development in all species?
high levels of what in the oocytes inhibits oocyte maturation?
low levels of what stimulate oocyte maturation?
what stimulates synthesis of hylauronic acid in the granulosa cells?
LH surge prior to ovulation
low levels of what appears to be CRITICAL for the resumption of meiosis?
what are the functions of anit-mullerian hormone?
inhibits growth of primordial follicles to become primary follicles
what happens after the LH surge?
ovualtion occurs and secondary oocyte at M II is released
in the mare, ovulation site is restricted to where on the ovary?
the ovulation fossa
in what female animal do dominant antral follicles develop and undergo ovulation only in the follicular phase?
what cells of the female reopro tract have LH receptors?
what cels of the female repro tract have FSH receptors?
___ production increases within the follicle in the pre-ovulatory phase and is highest at the time of ____ _____
low levels of estrogen = _____ feedback on FSH and LH secretion
very high levels of estradiol = ___ feedback on FSH and LH secretion
what is required for ovum maturation?
in what species is estradiol actually luteolytic?
cow and sheep
high levels of estrogen (at a certain threshold) causes what>
what increases cervical mucus secretion>
estrogen increases what receptors in endometrium?
what hormone is synthesized and secreted by the CL?
enzymes involved in P4 synthesis
- increase desmolase (cholesterol to prenenolone)
-increase 3B-hydroxysteroid dehydrogenase (prenenolone to P4)
-decrease 12a-hydroxylase (conversion of P4 to androgen)
which animal produces progesterone BEFORE ovulation?
small luteal cells have what kind of receptors?
large luteal cells have what kind of receptors?
large luteal cells produce what?
what hormone inhibits uterine contraction
what causes development of mammary glands during pregnancy?
what hormone prevents estrus>
progesterone acts primarily on the ______ and _____ FHS/LH secretion