How Caffeine Affects the Heart Rate of Daphnia

IntroductionThe purpose of this experiment is to determine whether or not caffein has an affect on the embrace locate of DaphniaHypothesisThe Daphnia lovingness rate get out increase with the concentration of caffein. I base my hypothesis on the fact that humans perfume range increase with caffeine as it acts as a input signal drug. In the experiment there end point be some(prenominal) varyings that I need to try and control, the temperature of the water is i 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 be my results inaccurate. I need to try and limit the human erroneous belief in the experiment as the daphnia heartbeat is truly nimble so it exit be hard to be alone accurate so we are using the ? unsighted order?. We need to use the same microscope throughout interrogation as others may have dissimilar strength lenses. I am also press release to keep the speci es of daphnia the same, as different species may react differently to the caffeine. I will use the same type of caffeine and record the get along of clip the daphnia spend in the caffeine in front 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 examination 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 h eartbeats of the Daphnia for 15 seconds. Thi! s 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

If you want to get a full essay, visit our page: cheap essay