Friday, 22 February 2013

2.48 describe experiments to investigate the effect of exercise on breathing in humans.

During exercise cells respire more quickly (to provide more energy for movement) this means oxygen has to be delivered more quickly and carbon dioxide taken away more quickly. As a result of this the lung muscles contract and relax more rapidly and the heart beats faster.

Measure a persons breaths per 10 seconds when stationary.
Then after one minute after running at 5mph then at two minutes and so on.
You will find a linear relationship as described above between the two.

5 comments:

  1. Thanks so much you have helped me so much hannah

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  2. The Biology Syllabus has changed.... New Syllabus Blog:

    http://igcse-biology-2017.blogspot.hk

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  3. more at

    http://igcse-biology-notes.blogspot.hk/2017/06/248-describe-experiments-to-investigate.html

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