The menstrual cycle is controlled by several different hormones. What effect does oestrogen have on the release of FSH?
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Card 7
Front
Which hormone causes an egg to mature in an ovary?
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Card 8
Front
On what day of the menstrual cycle is the egg released?
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Card 9
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Oral contraceptive pills used to contain large amounts oestrogen. Explain how oestrogen can prevent pregnancy.
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Card 10
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Modern contraceptive pills contain a much lower dosage of oestrogen.1.Give one advantage of taking these pills instead of the old high-oestrogen pills.2.Name one other hormone that is often used in contraceptive pills.
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Card 11
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On a hot summer day Katie is running in the park, while Colin is sitting still at home reading a book. Will Colin or Katie be losing more water through their skin? Give one reason for your answer.
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Card 12
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On a hot summer day Katie is running in the park, while Colin is sitting still at home reading a book. Will Colin or Katie have more concentrated urine? Give one reason for your answer.
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Card 13
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Control of the body's water content is part of homeostasis. Explain what is meant by homeostasis.
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Card 14
Front
In 1918, a Hungarian scientist called Arpad Paal did experiments to investigate how plants grow. The diagram below shows one experiment he did. When a stem grows to the left as shown above, which side is growing faster?
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Card 15
Front
Explain what makes the stems at the final stage grow to the left.
