Students commonly test the effects of chemical agents on the heart rate of the crustacean daphnia magna, but the procedure has never been optimized we determined the effects of three concentrations of ethanol, nicotine, and caffeine and of a control solution on heart rate in daphnia . This lab was designed to show how caffeine affected the heart rate of daphnia after exposing them to different concentrations of caffeine for ten minutes caffeine is a stimulant, which, in humans, causes heart rates and blood pressure to increase. And compute the average heart rate as performed above enter whether caffeine is a stimulant or depressant 7 after you have computed the caffeine affected heart rate, discard your daphnia as per your teacher’s instructions rinse and dry your depression slide 8 repeat steps 2 through 7 with each of your remaining test solutions.
The effects of caffeine on the heart rate of daphnia this lab was designed to show how caffeine affected the heart rate of daphnia after exposing them to different concentrations of caffeine for ten minutes. In this practical the caffeine should have a noticeable effect on the heart rate of daphnia as daphnia absorbs chemicals present in the solution around it without selection i also predict that there would be an increase in heart rate once placed in decaffeinated coffee as decaffeinated coffee still has caffeine content but significantly lower per milligram than caffeinated coffee. Investigating the effect of coffee on the heart rate of daphnia aim: to find out the effect of different caffeine concentrations on heart rate in daphnia independent variable:. Does caffeine affect the heart rate of daphnia introduction in this experiment i aim to find out if caffeine has an affect on heart rate instead of using human subject, whom may already have a high tolerance to caffeine or could have ingested caffeine that day making the tests unfair, i will use daphnia, a crustacean.
Published: wed, 31 dec 1969 in this experiment, i am going to determine the effect of different concentration of caffeine on the heart rate of daphnia daphnia is assumed as the substitute of human being in this experiment to investigate the effect of chemicals on the heart beat of living organisms. Daphnia heart rate has a more complex relation to temperature than a single enzyme-controlled reaction, caffeine has additional effects on the heart like . The effects of caffeine for heart rate in daphnia magna viridiana jefferson lab section 02 abstract caffeine is a widely used drug around the world and is classified as a psychoactive chemical which has a variety of effects in the body, one being the vasodilation of blood vessels for the cardiovascular system. Investigation: what factors affect the heart rate of daphnia a daphnia is a tiny crustacean (related to shrimp) that has a clear outside skeleton (carapace) and jointed legs like other arthropods, its heart is on its back the environment challenges each living thing to respond.
Hypothesis: daphnia subjected to a caffeine solution will show a rise in heart rate as caffeine is a stimulant that speeds up the body affecting the nervous system and rate in which the nerve pulses are sent and received in humans. This science fair project idea determines if a particular chemical has an effect (increase or decrease) on the heart rate of daphnia. Name tutor course date effect of nicotine on the heart rate of daphnia introduction when any new chemicals is introduced to a living organism, there must be a reaction or a certain change. Alcohol will slow the regular heart rate predicted results effect of caffeine on heart rate effect of alcohol on heart rate caffeine will increase the heart rate past the normal count of beats per minute introduction to experiment study the effects of alcohol, a depressant, and caffeine, a stimulant, on daphnia magna, commonly known as water fleas. A change in daphnia heart rate under the influence of a concentration of caffeine solution creates a procedure providing an interesting investigation into the effects of different chemical concentrations on a metabolic process and whether or not an increase of caffeine would increase the rate of metabolism in multi-celled organisms.
Daphnia was treated with aged water, caffeine, ethyl alcohol, nicotine, and epinephrine, and their effect on heart rate of daphnia was observed the results are posted on table 1: table 1: average heartshow more content. The effects of caffeine on daphnia - an experimental investigation problem: does caffeine effect the heartrate of daphnia hypothesis: i believe caffeine, when added to the water daphnia is in,. Introduction of topic the purpose of this experiment is to determine whether or not caffeine has an affect on the heart rate of daphniahypothesisthe daphnia heart rate will increase with the concentration of caffeine.
The heart rate of daphnia will increase as the concentration of caffeine is increased this is because the caffeine actually blocks the adenosine (form in which broken down glucose energy is stored) receptive sites on the heart muscle cells causing an increase in heart rate. Effects on the average heart rate of the d magna our null hypothesis is the average heart rate of d magna in the caffeine treatment groups (100, 200, and 300 mg) will not be significantly different than the average heart rate of. Chelsea perrins does caffeine affect heart rate introduction the purpose of this experiment was to see if caffeine had an effect on the heart rate of daphnia (water fleas) by observing them under the microscope and recording their heart rate over a period of time in concentrations of caffeine. The effects of caffeine on daphnia subsequently, _daphnia_ was treated with different type of hormone and the effect on daphnia heart rate was observed it was .
Effect of alcohol & caffeine daphnia heart rate pelin turk, lucas han, aiden o'connor & mitch johnson here is a box plot comparing our control group to our group a of non-pregnant daphnia control group in this experiment, the daphnia in the fresh water would be the control group. Investigating the effects of caffeine on the heart rate of daphnia shrimp - investigate the effect of caffeine on the heart rate of daphnia introduction aim: in this experiment we are trying to find out how varying the concentration of caffeine can affect the heart rate of daphnia shrimp. In this science buddies science project, you will test whether caffeine has an effect on heart rate, using the freshwater crustacean, daphnia magna, as an experimental model system you can customize this kit to include the daphnia magna culture kit, a fine-mesh net, caffeine, and other supplies needed to complete this experiment.