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12 Cards in this Set
- Front
- Back
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What are the five hormones involved in the menstrual cylce?
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GnRH, FSH, LH, Oestrogen, Progesterone
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Where is GnRH produced?
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The hypothalamus
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Where is FSH and LH produced?
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The pituitary gland
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Where is oestrogen and progesterone produced?
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The ovary
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GnRH stimulates the production of V which then stimulate production of W which ten inhibits the production of XYZ
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V = FSH, LH
W = Oestrogen and progesterone XYZ = GnRH, FSH and LH |
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Which hormone regulates tissues in the uterus which are involved in the menstrual cycle?
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O and P
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What are the four stages of the menstrual cycle?
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Follicular, ovulation, corpus luteum (luteal), menstruation
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What are the basic steps of the follicular stage?
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FSH released
Follicle stimulated to mature and produce oestrogen Promotes thickening of uterine lining Lining supports an embryo if fertilisation occurs |
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What are the basic steps of the ovulation stage?
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Mature follicle causes surge in LH, this leads to ovulation (release of ovum from ovary)
Ovulation would not occur without LH - high levels of oestrogen block LH surge - birth control |
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What happens in the Luteal stage?
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The remains of the follicle create the corpus luteum
LH stimulates corpus luteum to produce P and O This lasts 12 days - if no fertilisation occurs O and P block LH production Low P levels cause the corpus luteum atrophies |
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What happens in the menstruation stage?
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The uterine wall breaks down
Degenerating tissues, blood and egg pass out as 'menstrual flow' |
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How long does the menstrual cycle last?
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28 days
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