Puberty and menstrual cycle Flashcards
1
Q
What does your body do at puberty?
A
- it starts to release sex hormones which trigger off secondary sexual characteristics and cause eggs to mature in women
2
Q
Hormones promote —– —— at ——-
A
sexual characteristics , puberty
3
Q
Main reproductive hormone in males is…
What does this hormone do?
A
testosterone = produced by testes
- Stimulates sperm production
4
Q
Main reproductive hormone in females is…
What does this hormone do?
A
- oestrogen = produced in ovaries
Brings about physical changes and involved in menstrual cycle
5
Q
How many stages does the menstrual cycle have?
A
4 stages
6
Q
Explain the first 2 stages of menstrual cycle.
A
- Stage 1 = menstruation starts, uterus lining breaks down for about 4 days
- Stage 2 = The uterus lining builds up again. From day 4 to 14, into thick spongy layer full of blood vessels, ready to receive a fertilised egg
7
Q
Explain the last 2 stages of menstrual cycle.
A
- Stage 3 = Egg develops and is released from the ovary at day 14 = ovulation
- Stage 4 = wall is maintained from day 14 up to day 28.
= no fertilised egg = spongy lining breaks down and whole cycle starts again
8
Q
Four hormones menstrual cycle is controlled by?
A
- FSH
- LH
- Oestrogen
- progesterone
9
Q
What does FSH do?
A
- produces in pituitary gland = stimulates ovaries to produce oestrogen
- causes egg to mature in follicle
10
Q
What does LH do ?
A
- produced by pituitary gland
- stimulates ovulation at day 14 = causes egg to mature -
11
Q
What does oestrogen do?
A
- produced in ovaries
- causes lining of uterus to grow
- Stimulates release of LH and inhibits release of FSH
12
Q
What does progesterone do?
A
- Produced in ovaries by the remains of the follicle after ovulation
- Maintains uterus lining during the 2 half of cycle
When levels of progesterone falls = lining of uterus breaks down - Inhibits release of FSH and LH
