4.6 - The Menstrual Cycle Flashcards
1
Q
What is FSH?
menstrual cycle
A
- follicle stimulating hormone
- stimulates follicle growth
- 6-20 oocytes develop but one is typically released
2
Q
What is LH?
menstrual cycle
A
Luteinizing hormone
3
Q
Follicle stimulating hormone in the ovaries casues…
A
- follicles to develop
- follicles to release estrogen
4
Q
Estrogen in the mentrual cycle causes…
A
- endometrium (uterus lining) to thicken
- pituitary gland to release LH
LH = luteinizing hormone
5
Q
What does LH cause in the menstrual cycle?
LH = luteinizing hormone
A
- follicles to release the egg (causes ovulation)
- formation of the corpus luteum from remaining follicle cells
- loss of follicle causes short term drop in estrogen
6
Q
What does the corpus luteum do?
A
- releases estrogen and progesterone
- triggers thickening of endometrium
7
Q
Estrogen and progesterone causes …
A
- endometrium to thicken
- pituitary gland to stop releasing FSH and LH
- no new follicles to develop
8
Q
What does the lack of FSH and LH in the menstrual cycle cause?
A
- the break down of the corpus luteum into the degenerate corpus luteum
9
Q
What does the lack of corpus luteum cause in the menstrual cycle?
A
- stops release of estrogen and progesterone
- and that causes endometrium to break down (menstration)
10
Q
What causes an increase in body temperature in the menstrual cycle?
A
- caused by progesterone
11
Q
the corpus luteum acts like what?
A
it acts like an endocrine gland
12
Q
what does no progesterone cause?
A
- contraction of blood vessels in endometrium
- cuts off blood supply to linning and breaks down
- uterine contracts help expel debris
- contractions and prostoglandins released by the break down and cause cramps
