The Menstrual Cycle Everyone's favourite topic! 0.0 / 5 ? BiologyHuman BiologyGCSEAQA Created by: kennedylilyCreated on: 23-12-15 11:15 What is the definition of the menstrual cycle? The monthly release of an egg from a woman's ovaries, and the build-up and breakdown of the protective lining of the uterus 1 of 10 What is the first stage of the menstrual cycle? Day 1 is when the uterus lining begins to break down (usually lasts for about 4 days) 2 of 10 What is the second stage? The lining of the uterus builds up again (from day 4 to day 14) 3 of 10 What is the third stage? An egg is developed and then released (at day 14) 4 of 10 What is the fourth stage? The wall is then maintained (for about 14 days, until day 28) 5 of 10 What happens if no fertilised egg has landed on the uterus wall by day 28? The uterus lining starts to break down, and the cycle begins again 6 of 10 Which three hormones are involved, and what do they stand for? FSH (follicle-stimulating hormone), Oestrogen and LH ( luteinising hormone) 7 of 10 What is the function of FSH? It causes an egg to mature in one of the ovaries. It then stimulates the ovaries to produce oestrogen 8 of 10 What is the function of oestrogen? It causes the pituitary gland to produce LH. It then inhibits the further release of FSH 9 of 10 What is the function of LH? It stimulates the release of an egg at around the middle of the menstrual cycle 10 of 10
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