Quiz 2 Flashcards
Cards 24-31 from Q1 deck
Be able to draw menstrual cycle - take to Dr. Seibert to review prior to final exam.
How does the pituitary know which one to release FSH or LH because both are stimulated by GnRH release from hypothalamus?
The characteristics of the Pulsitile release determines which one is released.
Steroids are derived from _______ and produced by ______, _____ and _______
Cholesterol
Ovaries, testes and adrenal cortex
69% of sex hormones (estrodiol and testosterone) are bound to ______
30% bound to _______
And 1% is _____
SHBG (sex hormone binding globulin produced by the liver)
- that’s why estrogens help with acne - they accelerate the SHBG production so less free hormones are circulating. Also helpful with menopause. ONLY with ORAL form.
Albumin
Unbound/free
Estrogens are derived from ________ and converted by ______
Androgens/testosterones
Aromatase.
Estrone comes from _____
Estrodiol (2) comes from ______
Estriol (3) comes from _______
Body fat
Ovaries
Placenta (3rd source)
Eggs are arrested in _______
Prophase I - after “crossing over occurs”
A woman will ovulate about ______ times in her life
400
What is AMH (anti-mullerian hormone) a measurement of?
Secreted by Granulosa cells - a marker of reserve.
Activism stimulates ______ synthesis and secretion
Inhibin ______ FSH.
FSH
Inhibits - you don’t want a pregnancy with 12 fetuses.
Granulosa cells have ______ receptors and produce ______ to convert ________ into ______
Theca cells have ______ receptors and produce ______ that are converted to ______ by _______
FSH
Aromatase
Androgens
Estrodiol
LH
Androgens
Estrodiol
Aromatase from Granulosa cells.
What is the signal for the LH surge?
Estrodiol positive feedback a sustained 200pgx50hours. This triggers hypothalamus to pulse out GnRH like crazy to trigger the LH surge (with a little FSH trailing behind)
GnRH pulses during early follicular phase = ________
GnRH pulses during mid-follicular = ______ = ______
Ovulation = ______ = _________
Post ovulation + progesterone influence = _______
Rapid + shallow
Increasingly rapid rate = increased FSH
Very rapid and deep = LH surge.
Estrogen generally has a ________ on the hypothalamus that ______ FSH release
Negative
Inhibits