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An experiment to see if caffeine affects heart rate
Member rating: No Rating | Words: 1898 | Submitted: Mon Sep 17 2007
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An experiment to see if caffeine affects heart rate Hypothesis To test if caffeine affects the heart of daphnia Prediction I think that the higher the concentration of the caffeine solution the faster the heart rate will be. Caffeine is also known as trimerhylaxanthine and the chemical formula is C8H10N4O2. The caffeine will be absorbed into the blood where it travels into the brain. The caffeine molecule is the same size as the adenosine. Adenosine is a chemical in the blood that attaches to the nerve cells and slows it down therefore making a person tired. As caffeine is the same shape as adenosine the caffeine molecules attach to the nerve cell instead meaning, the adenosine molecule cannot get into the nerve cell. As the caffeine is a stimulant it then stimulates the nerve cell and this makes a person feel more awake and speeding up the heart rate. Caffeine also stimulates the pituitary...
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