Physiology of the female reproductive system Flashcards
(45 cards)
How long is the average menstrual cycle?
28 days
What is the normal range of the average menstrual cycle?
21-35 days
The first day of menses is considered the first day of the menstrual cycle. T/F
T
Which cells produce estradiol?
Granulosa cells
Which cells produce progesterone?
Theca cells and granulosa cells
When does the development of the primordial follicle begin?
10 weeks age of gestation
The growth of the primoridial follicle is (depend/independent) on LH and FSH.
Independent
Antral follicles are (dependent/independent) on LH and FSH for growth.
Dependent
Antral follicles secrete what during the time of preparation for ovulation?
Androstenedione and testosterone
What are the three phases of the menstrual cycle?
Follicular phase, ovulatory phase, luteal phase
What phase is days 1-13 of the menstrual cycle (in a 28 day cycle)?
Follicular phase
What phase is days 14-17 of a 28-day menstrual cycle?
Ovulatory phase
What phase is days 15-28 of a 28 day menstrual cycle?
Luteal phase
Which phase of the menatrual cycle is relatively constant?
Luteal phase
FSH rises gradually during which menstrual phase?
Follicular phase
The rising amount of FSH in the follicular phase ( increases/decreases) the sensitivity of granulosa cells for FSH.
Increases
The rising amount of FSH (increases/decreases) the granulos cells’ secretion of estrogen.
Increases
FSH (increases/decreases) LH receptors in granulosa and theca cells.
Increases
During the follicular stage of menstrual cycle, the LH level ( declines/rises).
Rises
Androgens (androstenedione) are transported to the granulosa cells and then are converted to which hormone by granulosa aromatase?
Estradiol
Inhibitin B (stimulates/inhibit)s androgen synthesis.
Stimulates
Inhibitin B (stimulates/inhibits) FSH secretion.
Inhibits
As the follicular phase progresses, FSH levels decline why?
Due to negative feedback by estrogen to hypothalamus and inhibitin B inhibition of FSH secretioin
FSH stimulates (estrogen/progesterone) secretion.
Estrogen