Daphnia Lab Report

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The results supported our prediction, the Daphnia treated with alcohol had a decrease in the heart rate. Ethanol slows heart rate. The 10% ethanol was used in this experiment, the ethanol depresses the nervous system by acting as a non-selective neuro-depressant. The amounts of ethanol necessary to achieve this effect in humans would also be sufficient to depress the respiratory centers of the brain, rather like the effect of an overdose of general anesthetic, resulting in death (GCSE Science).
We compared the untreated Daphnias’ data with the data of Carolina Biological Company. It was observed that the temperature plays a major role in increasing the heartbeat of the Daphnia, for example, at 10 degree Celsius it had the lowest heart rate

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