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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The affect of caffeine on Daphnia Heart rate Aim: To see the effect of caffeine on the heart rate of the water flea Daphnia. Introduction: Caffeine is a stimulant which is derived from leaves‚ flowers and seeds of plants. The plant uses the caffeine as a way to repel insects as it is used as a natural pesticide by paralyzing and killing certain insects. It is used as a stimulant to human the central nervous system by increasing the stimulatory of the neurotransmitters‚ however high levels
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caffeine concentration rises‚ so does the mean heart rate of daphnia. Risk Assessment: In this experiment there are the following risks both for the human that carries out the experiment and the daphnia: ← The human that carries out the experiment should be cautious not to touch the lamp with wet hands since it uses electricity. ← Also‚ be careful not to spill any of the pond water on the floor. ← As for the daphnia‚ there is a chance for them to die as when they are exposed to
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The Effects of Caffeine on the Heart Rate of Daphnia This lab was designed to show how caffeine affected the heart rate of daphnia after exposing them to different concentrations of caffeine for ten minutes. Caffeine is a stimulant‚ which‚ in humans‚ causes heart rates and blood pressure to increase. Its effects range from mild alertness to heightened anxiety and body tension. We wanted to see if caffeine affected the daphnia’s heart rate in the same way. We filled three containers with three different
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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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the experiment can be successfully carried out. It may also contain a prediction of the final answer (supported by a reason) Method: This is what was actually done or is going to be done. It may need a diagram‚ in which case it should be drawn using a ruler and pencil and it must be labelled. It should be set out so that someone else can easily understand the process. The diagram should be drawn in two dimensions and the apparatus should always be shown assembled. The method should be reproducible
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abiotic factors‚ which are the nonliving things in the eco-column‚ include the water used in the aquatic habitat‚ soil used in the decomposition habitat‚ air‚ and some rocks that were used in the decomposition habitat. The biotic factors‚ which are the living things in the eco-column‚ include the grass and/or the terrestrial plants used in the terrestrial habitat‚ the fish (guppies) used in the aquatic habitat‚ and finally the worms that were used to feed the fishes once. Those are all the factors
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Paul Stevenson Mrs. Pierson AP English III MagnaSoles™: A Satire 12/9/11 In this article from The Onion‚ the intent was to ridicule the American system of commercial capitalism. The author makes illogical appeals to logos as well as mockingly uses different forms of propaganda in order to satirize this obnoxious tradition. Several imitation appeals to logos are made throughout the article. The reader is bombarded by fabricated information that is riddled
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Aquatic Biomes An aquatic biome is an ecological community dominated by water. This biome can be broken down into two categories: o Freshwater‚ which includes rivers‚ streams‚ ponds‚ lakes and freshwater wetland. o Marine or saltwater‚ which includes oceans‚ seas‚ estuaries‚ coral reefs and saltwater wetland. Each of these aquatic ecosystems can be defined by variables such as temperature‚ the presence or absence of light‚ and the availability of nutrients. Aquatic biomes cover almost all the
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Jessica Austin AP English 3 Salyers 2 2.20.13 Aquatic Humanoids For generations‚ the human race has been fascinated with aquatic humanoids‚ a more common term being mermaids. Our ancestors have written literature‚ drawn pictures and sculpted statues of half-human‚ half-fish women. Personally‚ I believe these sea creatures could be non-fiction due to the fact that the world has explored less than five percent of our oceans; one cannot simply determine a specimen does not exist without proof and
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