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12 Cards in this Set

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