Female Hormones
- Created by: Annie
- Created on: 05-03-13 17:53
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- Hormones
- Special chemicals which coordinate many processes in your body.
- Special glands create and secrete hormones. Hormones are carried around the body to target applicable organs
- Hormones act quickly but effects are slow and long lasting.
- Menstrual Cycle
- Controlled by hormones made in pituiarty gland and ovaries.
- Levels of hormones rise and fall this effects the way the body works.
- Menstrual cycle - 28 days. Each month lining thickens to support baby. Egg starts maturing in ovary.
- 1. After 14 days, after egg starts maturing, it is released from ovary. This is called OVULATION. Lining stays thick for several days after egg is released.
- 2. If egg is fertilised by sperm. Pregnancy may occur. Womb provides protection and food for developing embryo.
- 2i. If NOT fertilised dead egg and lining of womb are discarded. This is called period.
- HORMONES IN MENSTRUAL CYCLE
- Once a month a surge of hormones from pituarty gland in brain starts eggs maturing in the brain. Hormones stimulate ovaries to produce female sex hormone oestrogen
- FSH is secreted by Pituiarty gland. It makes eggs mature in ovaries and stimulates ovaries to produce oestrogen.
- Oestrogen is secreted by ovaries. It stimulates womb to build up ready for pregnancy. It stops FSH production.
- Progesterone and lutenising hormone (LH)
- Hormones released by P.Gland and ovaries control what happens in cycle.
- When Oestrogen levels rise, they stop FSH production+ encourage LH production by P gland. When LH levels reach a peak in cycle they release a mature egg.
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