The Effect Of Caffeine On Heart Rate Of Daphnia

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Effect of Caffeine on Heart Rate of Daphnia Problem Statement How the Effect of Various Coffee Bean Roasts on the Heart Rate and Longevity of Daphnia Magna. Background Information on Coffee Caffeine is a compound found in mostly tea leaves, coffee beans, soft drinks, and some prescriptions. caffeine has a bitter taste to it. It is a white crystalline xanthine alkaloid. It’s from a family called heterocyclic compounds, and it is from a member of methylxanthines. Xanthines are purine that are found in most human tissues, fluids, and other organisms. Heterocyclic compounds are atoms in molecules joined in rings containing one atom of an element other than carbon. These two compounds form caffeine. caffeine is used in the world for many causes. Different medicines that caffeine is in are, Cold, allergies, and pain relievers. caffeine has an effect on the cardiovascular system, but it is said to be gentle. Caffeine is used in coffee and tea, chocolate, and energy drinks. Caffeine helps with staying focused, concentrate, alert and less sleepy. Light to Dark Coffee There are numerous misconceptions people have on coffee bean roasts. For example, It’s said that dark coffee has higher caffeine level and is stronger than light coffee. Most say dark coffee has more caffeine, but it’s not true. Most think that dark coffee has a bitter and strong taste to it and, therefore, it has more caffeine. In reality darker roasts have less caffeine than lighter roasts. When dark roasts is being roasted, some caffeine is lost during that process, and that makes dark roast coffee to have less caffeine. Medium roast is in the middle of dark and light roast. It has the regular amount of caffeine in it compared to dark and light roasts. Another misc... ... middle of paper ... ...rates the two sides of the heart. Daphnia Magna Daphnia magna also called water fleas. Daphnia is a type of species that has a small heart similar to human heart. Daphnia is found in Northeastern United State and Western Europe. It’s found in fresh and brackish water, such as lakes, rivers, and temporary pools. Daphnia prefers temperatures between 18-22 C. They are really small 2-5 mm long and are about the size of a kidney bean. The body is a shell-like structure, called carapace which is made of chitin. This species tends to change its color due to whatever it’s currently eating. Their carapace helps them produce water, carrying food and oxygen to its mouth and gills. Daphnia can reproduce sexually and asexually, and during this process of reproducing it can produce multiple offspring Heart of Daphnia Magna The heart of daphnia can be seen through it’s walls

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