Caffeine affecting heart rate- lab

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Honors Biology Final Lab Report June 9 2009 Problem: How does caffeine affect your heart rate? Hypothesis: Caffeine, as a stimulus would act to raise the resting heart rate. Approximately two bpm rise per mg per oz. Of caffeine. Procedure: • Gather a test group of 15 people who have not done any strenuous activity in previous hour, also no caffeine for 8 hours (to get resting heart rate). • Calculate the resting heart rate of the fifteen people, and record. • Take heart rate after twenty minutes have passed, and record. • Collect this data on three different test groups using the three variables of caffeinated beverage. Previous Research: The effects on caffeine have not been a closely researched topic in the scientific world. The topic and affects have been overviewed but the physical cost this drug takes has not been a concern to the public eye, because scientists have not produced a sufficient amount of public knowledge. Caffeine has a chemical name of 3, 7-dihydro-1, 3, 7-trimethyl-1H-purine-2, 6-dione (or 1, 3, 7-trimethylxanthyine for short). (msnhealth.com 2004) Caffeine works as a stimulant to the central nervous system, speeding up the neuron messages to and from the brain. Caffeine is the world’s most widely used drug. It can be found naturally in leaves, seeds or fruits. Although it is FDA approved caffeine has damaging affects to the body. Research has shown links between heavy use of caffeine and osteoporosis, high blood pressure and heart disease, heartburn, ulcers, severe insomnia and infertility. Some short term affects show anxiety, irritability, increased breathing and heart rates, restlessness, excitability, dizziness, headaches, lack of concentration, gastro-intestinal pains, dehydration, and frequent urination and bowel movements. (msnhealth.com 2004) Death can occur from a caffeine overdose. It would take approximately

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