Co-ordination and Control: Hormones Flashcards
1
Q
What is a hormone?
A
a chemical produced by a gland which travels in the blood to have an effect on a target organ
2
Q
What are the three hormones used in menstrual cycle?
A
- FSH
- LH
- Oestrogen
3
Q
Where is FSH produced?
A
pituitary gland
4
Q
role of FSH
A
- causes eggs to mature
- stimulates ovaries to produce oestrogen
5
Q
Where is LH produced?
A
pituitary gland
6
Q
role of LH
A
- stimulates egg release
7
Q
Where is oestrogen produced?
A
ovaries
8
Q
role of oestrogen
A
- inhibit FSH
- builds lining of uterus wall
- stimulates production of LH
9
Q
how does menstrual cycle work?
A
- pit gland produced FSH
- matures eggs
- oestrogen: uterus lining/ inhibits FSH
- one egg matured
- high conc of oestrogen stimulates gland for LH
- ovulation
- empty follicle dies until fertilsation
10
Q
What is the menstrual cycle?
A
preparation of female body for the egg to be fertilised
11
Q
how long is the cycle?
A
28 days
12
Q
stage 1
A
(days 1-5)
breaking down of uterus wall
13
Q
stage 2
A
lining builds up again - thick spongy layer
14
Q
stage 3
A
(day 14)
egg released from ovary
15
Q
stage 4
A
lining is maintained
no implantation - cycle starts again
