How Caffeine Affects the Heart Rate of Daphnia

IntroductionThe purpose of this experiment is to determine whether or not caffeine has an affect on the embrace valuate of DaphniaHypothesisThe Daphnia nerve rate get out increase with the concentration of caffein. I base my hypothesis on the fact that humans message range increase with caffeine as it acts as a input signal drug. In the experiment there issuing be some(prenominal) varyings that I need to try and control, the temperature of the water is star of these beca engross if the temperature is higher(prenominal) or lower on the day the results may break up being higher or lower, this would need my results inaccurate. I need to try and limit the human demerit in the experiment as the daphnia heartbeat is truly nimble so it leave be hard to be alone accurate so we are using the ? finesse order?. We need to use the same microscope throughout test as others may have dissimilar strength lenses. I am also release to keep the species of daphnia the same, a s different species may react differently to the caffeine. I will use the same type of caffeine and record the step of clip the daphnia spend in the caffeine onward the computation begins, and try to keep this to a similar range.

The free lance variable I will change is the concentration of caffeine in the water. I am going to be testing 0.1%, and 0.5% caffeine and also a distilled water trial. This means I will be able to see if the heart rate is great with caffeine or not. The variable we are going to bar is the rate of the Daphnia?s heartbeat and to do this we will use a microscope to count the heartbeats of the Daphnia for 15 seconds. This makes it ! more accurate as the heartbeat is fast so we... If you neediness to get a full essay, order it on our website: BestEssayCheap.com

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