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BIOL 404-Exam 4-Reproduction 13
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What hormone provides negative feedback on FSH production in the anterior pituitary but has no effect on LH levels?
Inhibin
What is the general action of the Granulosa cells during the follicular stage?
Nourish the oocyte
What cells nourish the oocyte during the follicular stage?
The Granulosa
What paracrine action do Granulosa cells produce?
The release estrogens which promote growth in Theca cells
What cells produce a stimulus for the Theca cells to grow?
Granulosa cells producing estrogen
Where are Antral fluids found?
In developing secondary follicle
What cells help in the production of antral fluids?
Granulosa cells
Receptors for what hormones are found on Granulosa cells?
FSH and Estrogens
What cells in the female gonads have FSH and estrogen receptors?
Granulosa
During what time period do Luteinizing hormone receptors develop on the granulosa cells?
Days 7-14
What receptors develop on Granulosa cells during days 7-14?
Luteinizing hormone receptors
What cells produce Inhibin?
Granulosa cells
What causes the spike in LH and FSH at ovulation?
Large amounts of positive feedback from estrogens acting on the hypothalamus and anterior pituitary
What is the effect of large amounts of estrogen providing positive feedback on the hypothalamus and anterior pituitary?
Spike in LH and FSH
Ovulation
What hormones are produced by the Corpus luteum?
Progesterone and estrogen
What provides negative feedback on the anterior pituitary and hypothalamus causing a drop in Estrogens and Progesterone?
Estrogen and Progesterone
What time period does positive feedback play a role in teh ovarian cycle?
During ovulation
LH causes Theca cells to produce androgens an what else?
Grow
Progesterone is under the control of what other hormone?
LH
What causes the membrane rupture that facilitates ovulation?
LH causes granulosa cells to produce prostaglandins
Prostaglandin enzymes break down the membrane facilitating ovulation
What drives the change in the endometerium thickness during the first 14 days of the menstrual cycle?
Estrogen
What drives the change in endometrium during days 15-28 of the menstrual cycle?
Progesterone
The endometrium under the pressures of progesterone has what characteristics?
Secretory
The endometrium under the pressure of only estrogen has what can be described as what?
Proliferative
Author:
kyleannkelsey
ID:
216176
Card Set:
BIOL 404-Exam 4-Reproduction 13
Updated:
2013-04-27 23:10:32
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BIOL 404 Exam Reproduction 13
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BIOL 404-Exam 4-Reproduction 13
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