hormones
- Created by: Meganallam
- Created on: 15-05-17 17:29
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- Hormones
- Many processes within the body are coordinated by chemical substances called hormones.
- hormones are secreted by glands and are transported to through the bloodstream.
- hormones are chemical messengers that travel in the blood.
- hormones are part of the endocrine system and regulate the functions of many organs and cells.
- many hormones are used in the menstrual cycle.
- follicle stimulating hormone (FSH)
- secreted by the pituitary gland and causes an egg to mature in the ovaries and stimulates the production of oestrogen.
- lutenising hormone (LH)
- stimulates the release of eggs from the ovaries
- oestrogen
- secreted by the ovaries and inhibits further production of FSH
- follicle stimulating hormone (FSH)
- hormones also control fertility
- oral contraceptives may contain oestrogen and progesterone to inhibit egg maturation
- the first birth-control pills contained large amounts of oestrogen which has significant side effects
- now they contain a much lower dose of oestrogen or are progesterone only.
- progesterone only pills have fewer side effects.
- IVF involves giving a mother FSH and LH to stimulate the maturation of several eggs.
- 1. the eggs are then collected from the mother and fertilised by sperm from the father.
- 2. the fertilised eggs develop into embryos. onece they are a ball of cells they are inserted into the uterus.
- Many processes within the body are coordinated by chemical substances called hormones.
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