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Does caffeine affect heart rate?
Member rating: No Rating | Words: | Submitted: Thu Feb 12 2004
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Does caffeine affect heart rate? The aim of this experiment was to test the effect of caffeine on the heart rate of a Daphinia (water fleas). Hypothesis: I prediction for this experiment is that an increase in caffeine on Daphinia will increase the heart rate because caffeine is a stimulant drug that increases the activity of the nervous system. Equipment; The equipment that I will use for this experiment is as follows: * Culture of Daphnia * Cavity slides and cover slips * Dropping pipettes * Distilled water * Caffeine tablets * Cotton wool * Standard glassware (beakers, measuring cylinders) * Stop watch * Paper towels * Light microscope Method; The procedure I will use is as follows: * Place afew strand of cotton wool on a cavity slide to help restrict movement of Daphnia. Transfer a water flea to the slide using a large pipette. Remove the water surrounding it using filter paper and add a few drops of distilled water. Use as much water as...
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