Transcription of DOES CAFFEINE AFFECT HEART RATE? - Edexcel
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DOES CAFFEINE AFFECT HEART RATE? - Edexcel
Salters-Nuffield Advanced Biology Resources Safety checked, but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances. 2015 University of York, developed by University of York Science Education Group. This sheet may have been altered from the original. Page 1 of 2 Activity Student Sheet Core Practical DOES CAFFEINE AFFECT HEART RATE? Purpose To investigate the effect of CAFFEINE on the HEART rate of Daphnia (water fleas). To develop practical skills. CAFFEINE Plants produce CAFFEINE as an insecticide. Cocoa in South America, coffee in Africa and tea in Asia have all been used for hundreds of years to produce pick me up drinks containing CAFFEINE . These days, CAFFEINE is also used as a flavour enhancer in a wide range of soft drinks.
investigation. Note: Daphnia are poikilothermic (cold blooded). Turn off the microscope lamp when not viewing the fleas. The following equipment will be available: Culture of Daphnia (water fleas) Cavity slides Dropping pipettes Distilled water Caffeine tablets Cotton wool
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