The Effect of Caffiene on Heart Rate

1658 WordsSep 26, 20127 Pages
TITLE: Effect of the caffeine on the heart rate OBJECTIVE: To investigate the effect of the caffeine on the heart rate of living organisms. INTRODUCTION: * Daphnia Daphnia are small, planktonic crustaceans, between 0.2 and 5 mm in length. Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because of their saltatory swimming style (although fleas are insects and thus only very distantly related). They live in various aquatic environments ranging from acidic swamps to freshwater lakes, ponds, streams and rivers.In the water flea Daphnia, the single, small heart is easily visible when viewed under transmitted light under a low power…show more content…
Equilibrated for 1 minute. 7) Results was recorded in a suitable format/graph. 8) The treatment was compared and the effect of each treatment on the heart rate was explained. RESULT: Concentration of Solution | The Number of Heartbeats of Daphnia | | Average heartbeats | | 0-15 s | 15-30 s | 30-45 s | 45-60 s | | Distilled Water | 69 | 68 | 65 | 65 | 66.75 | 0.1 | 70 | 74 | 62 | 65 | 67.75 | 0.2 | 73 | 74 | 77 | 77 | 75.25 | 0.3 | 77 | 78 | 74 | 73 | 75.50 | 0.4 | 76 | 80 | 74 | 73 | 75.75 | 0.5 | 89 | 80 | 77 | 75 | 80.25 | Table 1: The number of heartbeats of Daphnia based on the concentration Graph 1 : Average of heartbeats against Concentration of caffeine solution DISCUSSION: At first, distilled water was tested on Daphnia and it shows that the heartbeats was 66.75. distilled water do not have effect on Daphnia heart rate. The results present the normal heart rate of Daphnia. Then 0.1 concentration of caffeine solution was used on Daphnia by dropping 2 drops of caffeine solution on them. The average of heartbeats was 67.75. There is increasing of heart rate between distilled water and caffeine solution. Thus, we suggested that caffeine truly have effect on Daphnia. Hypothesis that we made earlier was accepted. The concentration is low that is 0.1% and cause there

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