Daphnias affected Heart Rate This lab experiment was conducted on Daphnias to test the chemical effects on its heart rate. In this experiment we determined the effects of caffeine and alcohol on the small organism. If the Daphnia is submerged in alcohol the heart rate will slow down, as if it’s submerged in caffeine it will speed up. The experiment measured how the stimulant caffeine or alcohol affected the Daphnia. The objective was to see how alcohol and caffeine would affect the Daphnia's heart rate. As for humans caffeine is a stimulant causing an increased heart rate. By adding higher percentages of the concentrations you see the changes. As I researched Daphnias, I learned that these are the most common water fleas. They live
