The Effect of Alcohol and Caffeine on the Water Flea: Daphnia Magna Kristoffer Osuntuyi Daphnia Magna Abstract: In this experiment I will find the base heart rate of each water flea. The base heart rate is the control in my experiment. The variables in the experiment are alcohol and caffeine. After finding the control of the first flea I will surround it with alcohol. The second flea will go through the same process as the first flea did‚ except the variable will be caffeine. The purpose of
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Researchers believe Daphnia magna alter their vertical migration behavior in the presence of ultraviolet radiation by adopting a deeper daytime distribution and avoiding potentially damaging levels of ultraviolet radiation in the top 3m of the water column. 4. A) Daphnia are affected by the presence of UVR in highly transparent lakes. B) The result depended on daytime observation in the experiment. C) In the experiment figure 3. Depicts the key results for Daphnia it showed the
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(number of deaths in a population). Laboratory populations of Daphnia are a good example of the effect of time lags on population growth (BOOK)!!!!!!. In this experiment Daphnia magna were utilized to observe the direct relationship of one limiting factor (food in this case) on the dynamics of
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and Caffeine on the Heartbeat Rate in Daphnia Magnus  Erika Huizenga Ashley Kofahl The Effects of Alcohol and Caffeine on the Heartbeat Rate in Daphnia Magnus Abstract The projects purpose was to determine the effects of alcohol and caffeine on the heartbeat rate in Daphnia Magnus. Our hypothesis is alcohol causes a decrease in heart rate‚ whereas caffeine causes an accelerated heart rate‚ predicting that the more caffeine we give the daphnia the faster it heartbeat rate will become
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Observing and Analyzing the Behaviors of Daphnia‚ Pill Bugs‚ Amoeba and Uglena Under Certain Experimental Conditions Testing Reactions to Gravity‚ Light and Food Jacob Kluth and Kelsey Jankowski Introduction This lab has introduced the use of daphnia‚ pill bugs‚ amoeba and Uglena. We the AP Biology students were first introduced to the test subjects to test his or her capability of handling living organisms for upcoming science experiments. The AP Biology students were asked to create original
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Shagun Mistry According to the experiment‚ the average normal heart rate of Daphnia is 20 heart beats per 12.94 seconds. There were six total trials done for Normal Heart Rate with 2 Daphnia (3 Trials each). The aim of this experiment was to measure the effect of neurotransmitters on the heart rate of Daphnia. When the adrenaline was added to the liquid around Daphnia and after a few seconds‚ its heart rate sped up. For example‚ during the first trial‚ the heart rate went
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The goal of this project is to test whether alcohol and caffeine has an effect on heart rate‚ using the freshwater crustacean‚ Daphnia magna‚ as the experimental subject. For humans‚ alcohol works as a depressant‚ slowing down the heart rate of the consumer; caffeine works as a stimulant‚ increasing the heart rate of the consumer. The heart depends on an internal pacemaker system to keep it pumping consistently and at the right speed. Alcohol disturbs this pacemaker system and causes the heart
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some cases the offspring inherit all the characteristics of his mother and it’s basically equal so the offspring inherits the diseases and characteristics of the mother‚ but also the offspring could be male in most of animals‚ that’s the case of Daphnia Magna. This specie could reproduce sexually but in natural populations parthenogenesis is the most common mode (Herbert‚ Ward 1972). Sexual reproduction is the mode of reproduction that most animals use but is the one that use more energy. Individuals
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blocks vasodilatory function‚ in which blood vessels become less dilated. Hence wise‚ caffeine is also known as a mild stimulant of the central nervous system and also stimulates the cardiac muscle and smooth muscles. Caffeine increases levels of neurotransmitters such as norepinephrine has been shown to increase the metabolic rate. For this experiment I believe that the cardiac arrhythmia will increase as the concentration of the caffeine increases. I also believe that the three the reading of the systolic
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pollinators. An experiment was held‚ on an aquatic invertebrate called ‘Daphnia’‚ to investigate the effect of caffeine on its heart rate. The fact that Daphnia is a transparent organism facilitates the experiment as it allows us to see its internal organs. Different caffeine solutions of different concentrations were used including one control solution without any caffeine in it at all. A caffeine solution is placed onto a Daphnia and the number of its heart beats within 10 seconds was counted. This
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