Juanita Sarmiento Daphnia Ecotoxicology Lab Report Introduction Ecosystems have a way of maintaining themselves under ordinary conditions but when a new factor is added that will most likely threaten the environment action needs to be put forth. Our environment is affected by many pollutants on a daily bases forming a threat to natural stability. For example some of the most polluted parts of the environment are bodies of water like that explained in our lab. Once pollution occurs
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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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TM How Does Temperature Affect Daphnia Heart Rate? Student Study Guide DID YOU KNOW? The body temperature of the Arctic squirrel drops from 98.6°F to 26.4°F‚ which is below the freezing point of water and is the lowest known body temperature of any living mammal. DID YOU KNOW? The average body temperature of the following warmblooded animals are: Humans: 98.6°F Rabbit: 101.3°F Polar bear: 99.1°F Blue whale: 95.9°F Owl: 104.4°F Ostrich: 102.6°F BACKGROUND Every animal
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research Project “How does drinking alcohol affect the wellbeing of teenage girls (between the ages of 14-17)” Contents Title Page Contents List of tables and figures Abstract Acknowledgements Introduction Literature Reviews Methodologies Results Analysis and Discussion Summary and Conclusion Bibliography Appendix 1 2 3 4 5 6 7-15 16 19-24 25 26 27-28 29-37 List of tables and Figures How old are you? When was the first time you tried alcohol? How often do you drink? What
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The purpose of lab number thirteen was to examine the response of the daphnia to a chemical stimulant. Also examined was how human resting heart rates differed from the daphnia’s. Stimulants are any substances that raise the levels of activity in the body. Stimulants could be a number of things such as physical or chemical. Physical stimulus usually deal with something that affects the five senses such as sight‚ hearing these could be attributed to loud noises or too much light going into your eye
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Effect of caffeine on Daphnia (Water fleas) Introduction- In this study I am going to investigate the effect of caffeine on Daphnia (water fleas) heart rate. I shall use daphnia as they would never have been exposed to caffeine before‚ unlike a human‚ who may have already developed a high tolerance to it. Another reason is that Daphnia have a very translucent body; therefore‚ it is relatively easy to see their heart under a microscope‚ which makes it easier to count the number of heartbeats
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pressure. This can lead to heart and circulation problems. Hypothesis: Daphnia subjected to a caffeine solution will show a rise in heart rate as caffeine is a stimulant that speeds up the body affecting the nervous system and rate in which the nerve pulses are sent and received in humans. (Caffeine increases the heart rate of Daphnia. ) Null Hypothesis: There is no significant difference between the heart rate of Daphnia in distilled water compared to that in caffeine. Safety: Handle cavity
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four days‚ before moving half of the rats to a new location and injecting them with a larger amount of ethanol. The rats that stayed in the same location remained relatively healthy‚ while nearly two-thirds of the rats in the new location died of alcohol poisoning. A similar experiment involving rats and morphine showed that the body can overcompensate for the expected effects of a drug when presented with a smaller dose. Rats were given relatively large doses of morphine for several days‚ and when
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the Bureau of Alcohol‚ Tobacco‚ Firearms and Explosives The U.S. Bureau of Alcohol‚ Tobacco and Firearms (ATF) is a tax-collecting‚ enforcement and regulatory arm of the U.S. Department of the Justice. The mission statement of the ATF is to protect our communities from violent criminals‚ criminal organizations‚ the illegal use and trafficking of firearms‚ the illegal use and storage of explosives‚ acts of arson and bombings‚ acts of terrorism‚ and the illegal diversion of alcohol and tobacco
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the experimental hypothesis was accepted. These findings could be due to the negative phototactic response that occurs when they are exposed to visible light that are above 600 Mn (nanometers) that are also considered the color red. This shows that Daphnia have a greater phototactic reaction to red light than when exposed to white light. When compared to a similar study‚ the same result was found. It was reported that there was a significant difference in the Daphnia’s phototactic reaction when exposed
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