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Card 6

Front

Which muscles contract when you breath in?

Back

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Card 7

Front

Give one advantage of a positive pressure breathing aid compared with the iron lung

Back

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Card 8

Front

Give two features of the villi which make them efficient exchange surfaces

Back

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Card 9

Front

Why do leaves have stomata?

Back

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Card 10

Front

By what process does water vapour move out of the leaves?

Back

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Card 11

Front

In what way is osmosis different to diffusion?

Back

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Card 12

Front

Give an example of when active transport is carried out by cells

Back

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Card 13

Front

What is meant by 'against a concentration gradient'?

Back

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Card 14

Front

Name the exchange surfaces in the lungs and intestine

Back

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Card 15

Front

What are the features of an efficient exchange surface?

Back

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