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Caffeine and Heart Rate: A Pharmacological Study Using Daphnia magna

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In this Science Buddies science project, you will test whether caffeine has an effect on heart rate, using the freshwater crustacean, Daphnia magna, as an experimental model system. You can customize this kit to include the Daphnia magna culture kit, a fine-mesh net, caffeine, and other supplies needed to complete this experiment.

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In this project, water fleas (Daphnia magna), a semi-transparent freshwater crustacean, are used to study the effects of caffeine on heart rate. Don't worry about having to learn how to take a crustacean's pulse: you can actually see the heart beating under a microscope. Many variations of this experiment are possible.

View the full project, background information, procedures, and more at ScienceBuddies.com