Research Experiment Examining the Effect of Caffeine on the Heart Rate of Water Fleas

Introduction: Caffeine is produced by plants as an insecticide. It is a medicine that acts as a human stimulant and increases heart rate and is used to increase the energy of tea and coffee and other beverages by adding flavor to drinks such as cola and diet foods . As the heart rate increases, the heart functions faster and leads to heart failure, which increases the risk of cardiovascular disease. High levels of caffeine are associated with increased stress and insomnia. It is also associated with heart disease because it increases blood pressure.

Effect of caffeine on heart rate The purpose of this experiment was to test the effect of caffeine on Daphinia's heart rate. Hypothesis: My prediction for this experiment is that as caffeine is a stimulant that increases the activity of the nervous system, the increase in Daphinia caffeine increases the heart rate. Equipment, equipment used for this experiment are as follows. * Culture of water raft * Hollow slide and cover glass * Drip pipette * Distilled water * Caffeine pill * Cotton * Standard glass products (beaker, measuring cylinder) * stopwatch * paper

Otters are a group of aquatic crustaceans commonly called hills. During this experiment the heart rate of 3 hills was observed at 3 different water temperatures. I found that the cooler the water the slower the heart rate. Regardless of the three different hills used, the average heart rate is nearly the same. Another question that we think when experimenting is that other environmental factors may raise Hill's heart rate? Before starting the experiment, I knew that the usual environment of Hill is an aquatic life. So, what affects their heart rate in the aquatic environment? If the environment is more acidic or less acidic, or if other species in the environment increase heart rate, will their heart rate increase? Many things can affect the otter's heart rate in the aquatic environment.

In this experiment, since it is unethical to use humans to test the effect of ethanol on heart rate in one study, I examined the effect of different concentrations of ethanol on the heart rate of Daphnia I will. Like many animals, Hill is a good candidate for studying the effect of inhibitors on the nervous system, due to its translucent exoskeleton and significantly changed heart rate, which is prone to alcoholism. Since RMM is a small molecule of 43, ethanol passes through the cell membrane by simple diffusion. Since the exoskeleton of Hill is not waterproof, there is a possibility that a layer of wax which is not waterproof will pass through. It is optimized for very thin walls and diffusion. They live in various aquatic environments from acidic wetlands to freshwater lakes, ponds, streams and rivers. They can withstand observations under the microscope and seem to be harmless when returning to the high seas.