Daphnia and Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression
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____________ of ____________ and ____________ on ____________ in Daphnia. (Length: not more than two pages of text in 12-point font‚ double-spaced; plus one page each for Table 1 and Figure 1.) Introduction: • Provide a few sentences of background information on the effects of these two drugs on heart rate in Daphnia or other animals (including humans). Cite the source(s) of your information‚ such as (Castle and Paulson 2010) for your laboratory manual. Also include the appropriate sources
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add the caffeine to the daphnia‚ the eart rate of the daphnia increases for example the daphnia’s heartbeat is 120 without caffeine‚ however when caffeine is added it is increased to 168. My graph shows a positive correlation and the error bars are also very small which shows that the results have a small range which suggests that my results are accurate and reliable. I think that the experiment was conducted well however there may be some ethical issues surrounding the fact that daphnias are also
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Daphnia‚ also known as the water flea are planktonic crustaceans that are found in lakes‚ ponds‚ and streams. They received “their common name from their jerky movement through the water” (Clare). They are also “very small‚ usually 2-5mm long‚ with an overall shape similar to a kidney bean” (Elenbaas). Daphnia play an important role in the freshwater food chains and serve as food for other freshwater organisms such as fish. They are also commonly used to test for chemical toxicity in water. Since
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Nicotine‚ think again Even though drugs such as caffeine and pharmaceutical drugs are widely used and accepted by society‚ they can still have an impact on your overall health. Nicotine is a highly addictive chemical excavated from the nicotiana tabacum plant or more commonly known as the tobacco plant. Nicotine is classified as a stimulant drug. The addictive drug is regarded as a potentially lethal poison and the median lethal dosage for an average adult human is between 30-60 mgs of nicotine.
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The Effect of Caffeine 1% and 2% on Daphnia magna’s Heart Rate Abstract: Ectothermic animals are animals whose body temperature is affected by their surroundings. This means that if the environment is cold the animal will be cold. If the environment is warm the animal will be warm. This is because the animal doesn’t have the capability of regulating its body systems to keep a constant body temperature. When an ectothermic animal is cold‚ its heart rate will lower. When
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the Heart Rate of Daphnia magna Introduction The Daphnia magna‚ more commonly known as water flea‚ is indigenous to ponds and lakes in northern and western North America. This crustacean has an outer transparent covering called the carapace. The unique physiology of the water flea is useful in translational research allowing researchers to visibly study all of the bodily systems without causing harm to the specimen (2). Being classified as an indicator species‚ the Daphnia magna are extremely
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this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another. We have to be careful
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of Caffeine on Daphnia Heart Rate: Aim: To investigate the effect of caffeine on the heart rate in Daphnia. Hypothesis: My hypothesis is that as the caffeine content increases‚ the heart rate if the Daphnia increases. Equipment: * Culture of water flea – Daphnia * Caffeine of 5 different concentrations * Microscope * Counter * Cavity Slide * Pipettes * Stop clock * Distilled water * Test tubes * Petri dish Method: 1. Remove one Daphnia and
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Expensive highs‚ expensive addictions‚ smoking is a worthless habit. Nicotine‚ like so many other harmful substances‚ is a drug. They have the power to affect how you feel about yourself and those around you. It takes full control of your body‚ like your brain has been infected by tar. The three main groups of drugs are legal‚ illegal and medicinal. Legal and illegal‚ what is the difference in today’s world? Smoking causes fatal hazards and I believe as a consequence‚ should be
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