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5 mark question ­ May 2010…read more

Slide 3

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4 mk question ­ Jan 2010…read more

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During exercise, the heart rate increases.
Explain, as fully as you can, why this
increase is necessary
4mark question ­ Jan 2010…read more

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During exercise, the concentration of carbon dioxide in the
blood increases.
Explain what causes this increase.
3 mark question ­ Jan 2011…read more

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