Biology

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  • Created by: Pippa
  • Created on: 02-06-13 13:31
What is the first stage of the menstural cycle? (1)
Stage 1 - Day 1 is when the bleeding starts. The uterus lining breaks down for about four days.
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What is the second stage of the menstural cycle? (2)
Stage 2 - The lining of the uterus builds up again, from day 4 to 14, into a thick spongy layer of full blood vesssels, ready to recieve a fertilised egg.
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What is the third stage of the menstural cycle? (3)
Stage 3 - An egg is released from the ovary at day 14
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What is the fourth stage of the menstural cycle? (4)
Stage 4 - The wall is then maintained for about 14 days until day 28. If no fertilised egg has landed on the uterus wall by day 28 the spongy lining starts to break down again and the whole cycle starts again.
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What are the 3 main hormones involved in the menstural cycle?
FSH (follicle stimulating hormone),Oestrogen and LH (luteinising hormone)
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What is FSH?
FSH - Follicle stimulating hormone. 1) Produced in the pituitary gland. 2)Causes egg to mature in one of the ovaries. 3)Stimulates the ovaries to produce oestrogen.
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What is oestrogen?
Oestrogen - 1)Produced in the ovaries. 2)Causes pituitary to produce LH. 3)Inhibits the further release of FSH.
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What is LH?
LH - Lutenising hormone. 1)Produced by the pituitary gland. 2)Stimulates the release of the egg at around the middle of the menstural cycle (about 14 days)
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True or False? (True)
The hormones FSH,LH,oestrogen and progesterone can be used to artificially change how fertile a woman is.
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What is progesterone also known as?
Combined oral contraceptive pill
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Card 2

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What is the second stage of the menstural cycle? (2)

Back

Stage 2 - The lining of the uterus builds up again, from day 4 to 14, into a thick spongy layer of full blood vesssels, ready to recieve a fertilised egg.

Card 3

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What is the third stage of the menstural cycle? (3)

Back

Preview of the front of card 3

Card 4

Front

What is the fourth stage of the menstural cycle? (4)

Back

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Card 5

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What are the 3 main hormones involved in the menstural cycle?

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