control in the human body 3.0 / 5 based on 1 rating ? BiologyCells, tissues and organsGCSEAQA Created by: ninaCreated on: 27-05-13 19:29 what are hormones? chemical substances that causes changes in the body 1 of 27 where are hormones produced and released? glands 2 of 27 how do hormones travel to the target organ? through the bloodstream 3 of 27 what is the name for the maintenance of a constant internal enviornment? homeostasis 4 of 27 why is the water content in our bodies controlled? to protect our cells from too much or too little water 5 of 27 how is the water content in our bodies controlled? exhaling, sweating and urine 6 of 27 why is the ion content in our bodies controlled? to protect our cells from too much or too little water 7 of 27 how is the ion content in our bodies controlled? by producing less insulin or taking it in 8 of 27 why is the temperature of our bodies controlled? to maintain the temperature at which enzymes work best (37degreesC) 9 of 27 how is the temperature of our bodies controlled? blood flow to the skin, sweating, shivering, respiration 10 of 27 why are our blood sugar levels controlled? to provide cells with a constant supply of energy 11 of 27 how are blood sugar levels controlled? by the release and storage of glucose which is controlled by insulin 12 of 27 which hormone stimulates an egg to mature? which gland does it come from? FSH from the pituitary gland 13 of 27 what does oestrogen do? thickens lining of uterus, inhibits production of FSH, stimulates release of LH 14 of 27 which gland produces oestrogen? ovaries 15 of 27 what is ovulation and which hormone stimulates it? release of the mature egg caused by LH 16 of 27 which hormone does LH inhibit the production of? oestrogen 17 of 27 why does the uterus lining need to be thickened again after it has been shed? so it can embed the egg if it's fertilised 18 of 27 what hormones does the oral contraceptive pill contain? oestrogen and progesterone 19 of 27 how do oral contraceptives prevent pregnancy? inhibit the production of FSH so no eggs mature because without no mature eggs there will be no pregnancy 20 of 27 what were some of the side effects of the original birth control pills? contained oestrogen only so caused blood clots, heart attacks and strokes 21 of 27 what are 2 advantages of oral contraceptives? decrease chances of pregnancy, effective, population control, easy to use, control period, control acne 22 of 27 what are 2 disadvantages of oral contraceptives? side effects, some religions/cultures against it, no protection against STDs, upsets natural bodily environment 23 of 27 what hormones do fertility drugs contain? FSH and LH 24 of 27 what are the processes of IVF? egg and sperm fertilised outside the womb. once these develop into embryos one or two are placed into the uterus of the mother 25 of 27 what are 2 advantages of IVF? allows people who can't become pregnant naturally to have kids, have 2 cycles free on NHS, allows older women to have kids 26 of 27 what are 2 disadvantages of IVF? side effects, not guaranteed to work, expensive, multiple births, some religions/cultures against it 27 of 27
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