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Development of ovaries over testes occurs when?
there is an abscens of TDF and mullerian inhibiting factor
What are the stages of follicular development?
primordial follicle-->primary follicle-->multilayered primary follicle-->secondary follicle-->graafian follicle
What is the zona pellucida?
an amorphous substance secreted between the granulosa cells and the oocyte
What do granulosa cells secrete into the intercellular space of the follicle to create the secondary follicle?
What happens to the cumulus oophorous just before ovulation?
it breaks down, allowing the oocyte to float freely within the antrum
What happens at ovulation?
the follicle swells through the tunica albiguinea and germinal epithelium, and bursts releasing the egg into the pelvic cavity
What kept the oocyte from meiotically dividing before just before ovulation?
oocyte maturation inhibitor
What is the function of progesterone?
induces growth of the endometrial lining preparing for implantation
After ovulation the theca interna becomes...
theca lutea, still produces androgens and progesterone
After ovulation granulosa cells are called...
granulosa lutean cells, and continue to produce progesterone and convert androgens to estradiol
If pregnancy occurs, what happens to the corpora? If it does not?
1. corpora persists for up to 3 months 2. corpora becomes corpora albicans and degenerates
What happens to the secondary oocyte after ovulation?
it is directed to the oviduct by the fimbriae
What characterizes primary villi? secondary? tertiary?
1. syncytiotrophoblast and cytotrophoblast 2. addition of mesenchym 3. formation of blood vessels
What is merocrine secretion?
When the membrane surround protein to be released fuses with the plasma membrane, and only the protein is released
ex. milk from mammary gland, and some sweat glands, produces secretion in tiny vesicles for stimulus to release. surface membrane bulges out with vescicles then pinches off like cell division and releases cell. fragments of cell are released.
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