Da lady bits Flashcards
What is the germinal epithelium
covers surface of ovary
What is the ovarian cortex
Ovarian follicles and stormal cells
What is the ovarian medulla
blood vessels, lymph, nerves
When do you start to form the egg cells in the ovary
prenatal
What do the ovarian follicles do
Secrete estrogens
What does the corpus lutem do
Produces progesterones, inhibins, estrogen, and relaxin
What is the earliest stage of follicular development
primordial follicle
What happens when the primordial follicles develop into primary follicles
Primary oocyte surrounded by granulosa cells
Zona pellucida forms
Stromal cells organize into thecal layer
What happens when primary follicles develop into secondary
granulosa cells excrete follicular fluid
Theca splits into theca interna and externa
What does LH act on
thecal cells
Cells produce testosterone from cholesterol
What does FSH act on
Granulosa cells
Takes testosterone and converts it to estradiol
What does estrogen normally do to LH and GnRH levels
Inhibit
What happens when estrogen levels rise during ovulation
estrogen becomes stimulatory to LH and GnRH
Leads to LH surge
What is the corpus luteum
If oocyte is not fertilized, corpus luteum is transitory
What does the corpus luteum become if the oocyte is not fertilized
Corpus albicans
What happens to hormone levels if oocyte is not fertilized
GnRH, FSH, LH rise due to loss of negative feedback
What does GnRH do
Secreted by hypothalmus
Regulate LH and FSH
What does FSH do
Initiate follicular growht
Stimulate ovarian follicles to secrete estrogens
What does LH do
Stimulate: further development of ovarian follicles-secretion of estrogen
Trigger ovulation
Formation of corpus luteum
What does estrogens do
maintenance of repro structures
inhibits GnRH, LH, FSH
Bone builiding
What does progesterone do
secreted by corpus luteum
prepare and maintain milk production
Inhibits actions of estrogen
Inhibits secretion of GnRH and LH
What do uterine tubes do
Provide route for sperm
Target for hormones
What does estrogen do to oviduct
Influence cilia* beat
What does estrogen do to the uterus
stimulates epithelial proliferation
What does progesterone do to the uterus
Inhibits estrogen-stimulated epithelial proliferation
Stimulates glandular secretion
What hormones influence mammary gland fucntion
Prolactin
Oxytocin
Where is relaxin produced
Corpus luteum
What does relaxin do
Relax uterus- inhibits contraction of myometrium
Where is inhibin secreted from
granulosa cells of growing follicles and corpus luteum
What does inhibin do
Inhibits secretion of FSH and LH
What does oxytocin do during birth
cause myometrial contraction
shoots out da baby
short-half life
What do ovaries produce
Gametes
Hormones
