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12 Cards in this Set
- Front
- Back
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Hormones
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chemical substances secreted by glands that help to regulate processes in the body
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homeostasis
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maintaining a constant internal environment in the body
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What controls the internal environment?
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hormones and the nervous system
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FSH
(hormones of the menstrual cycle) |
produced by the pituitary gland
1. causes the egg to mature in the ovary 2. stimulates the ovaries to release the hormone oestrogen |
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oestrogen
(hormones of the menstrual cycle) |
produced by the ovary
1. stops the production of FSH so only 1 egg matures per cycle 2. stimulates pituitary gland to produce the hormone LH |
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LH
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produced in the pituitary gland
causes the mature egg to be released from the ovary |
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oral contraceptive (the pill)
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contains oestrogen or oestrogen and progesterone which inhibits the production of FSH in the pituitary so no eggs can mature in the ovaries
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Fertitlity drugs
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contain FSH which stimulates eggs to mature in the ovary
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IVF
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the egg is fertilised outside the woman's body and then implanted in the uterus
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problems with oral contraceptive
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changes in weight, mood, blood pressure
increased risk of blood clots |
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problems with fertility drugs
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multiple conceptions (twins, triplets) may lead to problems in pregnancy and childbirth which may lead to premature or underweight babies
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problems with IVF
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ethical problems with parents choosing 'desirable' traits or the sex of their child
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