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BIOL 404-Exam 4-Reproduction 12
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What occurs during days 8-14
LH increases rapidly
dominant follicle becomes the Graafian follicle
System ramps up for ovulation
During what time period doe the dominant follicle become the Graafian follicle?
During days 8-14
Where are most of the hormones being produced during day 8-14?
By the graafian follicle
What marks the time of ovulation?
Peak of FSH(small) and LH(large)
how long does the fertile period last?
One day before and one day after ovulation
After the beginning of the leuteal phase, what changes occur with estrogen and progesterone?
Estrogen drops and progesterone begins to rise
At ovulation what hormone change occur with androgens?
Androgens rise to stimulate sexual drive
What stimulates sexual drive in females at the time of ovulation?
Increased Androgens in the blood
At the end of the leuteal phase what happens with LH, FSH , estrogen and progesterone?
LH and FSH rise
Estrogen and progesterone drop
What effect doe LH have on the theca cells?
Stimulation to produce androgens
What stimulates the theca cells to produce androgens?
LH
What cells in the ovaries produce androgens?
The Theca cells
What do the Theca cells have a paracrine action on?
The Granulosa cells
Describe the paracrine action that the theca cells have on the granulosa cells:
The theca cells secrete androgens, which stimulates the granulosa cells of turn them into estrogens with aromatase
What cells of the ovaries contain aromatase?
The granulosa cells
What enzyme turns Androgens into Estrogens?
Aromatase
What cells does FSH act on?
Granulosa
What anterior pituitary hormone acts on the Granulosa cells?
FSH
What cell does LH act on?
Theca cells
The theca cells are acted on by what anterior pituitary cell?
LH
What provides positive feedback for aromatase action in the granulosa cells?
Estrogen
What type of action does Inhibin have on the production of FSH by the gonadotrophs of the anterior pituitary?
Primary negative feedback
What effects does Inhibin have on the anterior pituitary?
Negative feedback for FSH
No effect on LH
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Author
kyleannkelsey
ID
216174
Card Set
BIOL 404-Exam 4-Reproduction 12
Description
BIOL 404-Exam 4-Reproduction 12
Updated
2013-04-27T23:09:58Z
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