number of microscopes you have and access to a healthy culture of Daphnia. Students can readily follow this procedure working in pairs. Because of the variability of results between individual Daphnia it is not appropriate to make conclusions from one set of results‚ so each pair (or group) of students should carry out more than one investigation to contribute to the class set. One option is to record a live video of a sample Daphnia‚ during a time period in which students count the heart beats.
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Abby Goldschmidt Honors Biology 2° Mrs. Gempel September 3‚ 2015 Daphnia Lab Results Paper Abstract The goal of the study was to observe the effects of multiple chemicals on a Daphnia magna’s heart-rate compared to a control (pond water). The different chemicals were caffeine and alcohol. The heart-rate was the main variable in this experiment. The Daphnia’s heart-rate was observed for 15 seconds and then multiplied by 4 to show its heart-rate in one minute. This was repeated 4 times for each
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What is the content difference between energy drinks and coffee and are they safe? There are hundreds of different brands of energy drinks being marketed and their caffeine content per can or bottle ranges from just 50 mg to as much as 505 mg (Weise‚ 2008). Energy drinks are most commonly consumed by people 11-35 years old (Ballard et al.‚ 2010). Energy drink companies can say anything they want about energy and performance effects of the drinks‚ and while some energy drinks are banned in some
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The popular name for Daphnia is ‘water fleas’ because they resemble fleas in shape and movement. Unlike fleas‚ which are insects‚ Daphnia are crustaceans classified under the scientific order‚ Cladocera. The purpose of this experiment was to examine the alertness of Daphnia ambigua alertness at different temperatures. It involved the incubation of 30 Daphnia ambigua in three 100ml beakers. Exposing each beaker to a different temperature revealed that temperature of the surrounding environment had
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The Effect of Temperature and Epinephrine on The Heart Rate of Daphnia Leslie Orzetti-Gollhofer Gaby Macias INTRODUCTION The Daphnia is a Crustacean other known as the water flea. It lives in small bodies of freshwater. The Daphnia is ectothermic‚ meaning it controls its body temperature through external means. With this experiment we experienced first hand what the effect temperature has on a Daphnia’s heart rate. We also experimented what effect epinephrine has on a Daphnia’s heart rate.
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Teratogenetics: Caffeine as a teratogen Chase Palmer Fremont High School Hansen p.4 Abstract The purpose of this paper is to identify the teratogenetic affects of caffeine in unborn children and breast feeding children. The following topics will be discussed: Risk of congenital anomalies‚ risk of spontaneous abortion‚ risk of low birth weight and preterm labor as well as‚ the critical period of the teratogen‚ short term and long term affects‚ and the changing danger of the teratogen relating
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The Effect of Caffeine on Heart Rate Caffeine is made by plants as a way of getting rid of insects. Cocoa is produced in South America‚ coffee in Africa and tea is produced in Asia have all been used for a very long time to give us a little rush in order to keep us going. Now caffeine is also used as a flavour enhancer in cola and other soft drinks also it has medicinal uses in aspirin preparations and is found in weight-loss drugs and as a stimulant in normal people in everyday to
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Paper Many Americans have included caffeine as a part of their daily diet whether they realize it or not. In fact‚ “caffeine is the most consumed psychoactive substance in the world” (Ruxton How is this instead (Caffeine is especially common throughout…) 15). It is found very especially commonly throughout every day foods and consumed mostly though through coffee‚ tea‚ soda‚ and chocolate (Spiller 200). Many Americans participate in the use of caffeine; it is estimated that 90% of adults
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Caffeine What do you call a cow who’s just given birth? De-calf-inated! How many of you have had a cup of coffee today? How about a soft drink? Chocolate? An Excedrin? All of the above products have one thing in common: They all contain caffeine. In this speech‚ we’ll look at caffeine’s origins and how it spread‚ some caffeinated products‚ and the effects that caffeine has on the body. On any given day‚ four out of five Americans have a already digested it‚ making it the World’s most popular
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Effect of Chemicals on Daphnia Heart Rate Background: In the world today‚ there are many chemicals that people use to fix or help with issues within their own bodies. Some of these chemicals may include things like caffeine‚ nicotine‚ and alcohol. These supplements can have substantial effects on other things within the body like the brain‚ liver‚ and especially the heart. For example‚ many chemicals like caffeine‚ nicotine‚ aspirin‚ and sleep aid all have effects on the body which can cause your
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