Menstrual cycle!

?
  • Created by: Izzy2807
  • Created on: 05-10-19 20:51
What are the 4 stages of the menstrual cycle?
Menstration (5-7 days), Follicular Phase (6-7 days), Ovulation (1 day), Luteal Phase (12-14 days)
1 of 21
What hormone does the hypothalamus release?
Gonadatropin Releasing Hormone (GnRH)
2 of 21
GnRH travels through the blood stream to what gland? What does this stimulate?
Anterior Pituitary Gland, stimulating the APG to release Follicle Stimulating Hormone (FSH) and Luteinising hormone (LH)
3 of 21
Where do FSH and LH travel to?
The ovaries (where the ovum are), entering via ovary capillaries
4 of 21
What does FSH stimulate (in the ovaries)?
Follicle maturity
5 of 21
Only some ovum in the ovaries mature each month, how many will ovulate?
Only one
6 of 21
Whilst the follicles mature, what hormone do they release?
Oestrogen
7 of 21
What feedback loop does oestrogen produce (at low concentrations) for LH?
A negative feedback loop for LH
8 of 21
When oestrogen levels are high, what level is FSH?
Low! A negative feedback loop! So when oestrogen levels are low, FSH levels are high.
9 of 21
What does oestrogen stimulate?
Endometrial growth
10 of 21
After 10 days, oestrogen levels rise, what feedback loop does this stimulate for LH (at high concentrations)?
A positive feedback loop for LH!
11 of 21
The release of LH triggers what?
Ovulation of the mature follicle
12 of 21
What does the ovulation of the mature follicle do?
It releases the oocyte (immature ovum)
13 of 21
After ovulation, what happens to the mature follicle?
It turns into a corpus luteum, now in the luteal phase
14 of 21
What 3 hormones does the corpus luteum secrete?
Oestrogen, Inhibin and Progesterone
15 of 21
Oestrogen and Progesterone stimulate the thickening of what lining?
Endometrial lining
16 of 21
As the CL degenerates, all hormone generation degenerates too, what effect does this have on the cycle?
The decrease in progesterone will no longer have a negative feedback effect on GnRH, so a new cycle can start!
17 of 21
What specific role does progesterone have in the cycle?
It has a negative feedback effect on the hypothalamus for GnRH release
18 of 21
What does inhibin do (secreted when the corpus luteum degenerates)
It inhibits FSH secretion
19 of 21
What are the 3 stages of the endometrial cycle/development?
Menstruation (days 1-5), Proliferate phase (days 6-14), Secretory phase (days 15-28)
20 of 21
What happens at the menstrual, proliferate and secretory phase?
M: endometrial lining degenerates and is shed. P: endometrium starts to regenerate S: endometrium regenerates rapidly and thickens
21 of 21

Other cards in this set

Card 2

Front

What hormone does the hypothalamus release?

Back

Gonadatropin Releasing Hormone (GnRH)

Card 3

Front

GnRH travels through the blood stream to what gland? What does this stimulate?

Back

Preview of the front of card 3

Card 4

Front

Where do FSH and LH travel to?

Back

Preview of the front of card 4

Card 5

Front

What does FSH stimulate (in the ovaries)?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Other resources:

See all Other resources »See all Midwifery resources »