Daphnia Lab Report Essays

Daphnia Lab Report Essays Daphnia Lab Report Paper Daphnia Lab Report Paper A pipette was used to place the Daphnia with water on a glass slide. The slide was then placed under a glass microscope to be observed for the experiment. A tally counter was used to count the heart rates of the Daphnia when it was placed in warm water, under ice and in epinephrine. RESULTS When we experimented what the effect temperature has on the Daphnia heart ate, we started with an average control of 64 beats in 15 seconds. After placing the Daphnia in warm water the average heart rate went up to an average of 72 beats in 15 seconds, with an average increase of 12. 5%. When we placed the Daphnia over ice the average heart rate decreased to an average of 43 beats in 15 seconds, with an average decrease of 33%. When we experimented what the effect of epinephrine has on the Daphnia heart rate, we started with an average control of 73 beats in 15 seconds before adding epinephrine. When he epinephrine was added to our experiment the average heart rate increased to 83 beats in 15 seconds. , with an average of 14%. After the epinephrine was diluted from the slide the average heart rate returned to an average of 78 beats in 15 seconds, with a decrease of 7% from the heart rate with epinephrine. DISCUSSION After putting the Daphnia in warm water the average heart rate increased by 12. 5%. The average heart rate then decreased by 33% in cold water. This is because they are cold-blooded animals; therefore they cannot go through harmoniousness. Their body temperature rises and falls, along with its heart rate, depending on the environment theyre exposed to. After applying the epinephrine the heart rate shot up by 14% and decreased after being diluted in water by 7%. Epinephrine is adrenaline. On any animal adrenaline makes the heart rate go faster which brings us to our results. CONCLUSION With this experiment we saw the effects of temperature and epinephrine on a Daphnia heart rate. All three of my hypotheses were proved correct.