This website uses cookies to ensure you have the best experience. Learn more

How Caffeine Affects The Heart Rate Of Daphnia

1138 words - 5 pages

IntroductionThe 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.I based my hypothesis on the fact that humans heart rates increase with caffeine as it acts as a stimulant drug.In the experiment there will be several variables that I need to try and control, the temperature of the water is one of these because if the temperature is higher or lower on the day the results may end up being higher or lower, this would make my results inaccurate. I need to try and limit the human error in the experiment as the daphnia heartbeat is very quick so it will be hard to be completely accurate so we are using the “blind method”.We need to use the same microscope throughout testing as others may have different strength lenses. I am also going to keep the species of daphnia the same, as different species may react differently to the caffeine. I will use the same type of caffeine and record the amount of time the daphnia spend in the caffeine before the counting begins, and try to keep this to a similar range.The independent variable I will change is the concentration of caffeine in the water. I am going to be testing 0.1%, and 0.5% caffeine and also a distilled water trial. This means I will be able to see if the heart rate is greater with caffeine or not. The variable we are going to measure is the rate of the Daphnia’s heartbeat and to do this we will use a microscope to count the heartbeats of the Daphnia for 15 seconds. This makes it more accurate as the heartbeat is fast so we can the times the result by 4 to get the actual result for 1 minute.I am going to be using a pipette to transfer the daphnia from the pond water to the cavity slide; this makes it easier for us to transfer the daphnia, without killing them. It also means we can reduce the amount of pond water on the slide making it more accurate. There is ethical issues regarding the daphnia, this means we will just perform the experiment in the quickest time possible, so as not to do any harm to them. I will just perform the experiment as quickly as possible because too much caffeine for too long could harm the daphnia. Using a pipette also reduces the risk of harming the daphnia as they are so small we cannot pick them up with our hands or we would injure them. We used distilled water aswell on cotton wool to give the daphnia a sufficient supply of oxygen so they can survive.There are also many risks with this experiment, we need to make sure all bags and stools are under the desk. We also need to be careful of dropping any glass and wash our hands after handling the daphnia as they are live living organisms.Equipment•Culture of Daphnia•Cavity slides•Dropping pipettes•Distilled water•Caffeine solution of different concentrations•Cotton wool•Stop clock•Microscope•BeakersMethod1.Get all the equipment...

Find Another Essay On How Caffeine Affects the Heart Rate of Daphnia

How Concentration and Temperature Affects the Rate of Reaction

804 words - 3 pages How Concentration and Temperature Affects the Rate of Reaction between Magnesium Ribbon and Hydrochloric Acid. WHAT I AM INVESTIGATING I am going to investigate how concentration and temperature affects the rate of reaction between magnesium ribbon and hydrochloric acid. MY PREDICTION The thing which I expect to happen is the more acid added to water the faster the reaction will happen. Also the hotter the solution the quicker

To study how concentration affects the rate of a reaction

1105 words - 4 pages balance. As the gas is released, the change in mass can be measured easily.*Volume of gas given off - As gas is given out, a gas syringe measures the total amount releasedExperiment write upAimTo plan and carry out an investigation that shows how concentration affects the rate of a reaction.Key factorsI will only change the concentration of the acid while conducting this experiment. I will increase the concentration of the acid by 0.5 molar on

Effect of caffeine, nicotine, alcohol, epinephrine on Daphnia

4061 words - 16 pages investigated which substances act as stimulants and which substances act as depressant. 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 heart rate for Daphnia at pre-stimulus and post stimulus for different hormones: # of Try Aged Water Caffeine Ethyl Alcohol Nicotine Epinephrine Control

Investigating how the concentration of reactants affects the rate of reaction

1897 words - 8 pages Investigating how the concentration of reactants affects the rate of reaction Chemistry Coursework This experiment is aimed at investigating how the concentration of reactants affects the rate of reaction: The reaction between hydrochloric acid and magnesium will be used to investigate how different concentrations of the acid affect the rate of reaction. The gas produced from the reaction will be measured and used to display the average rate

How concentration of acid affects the rate of reaction with magnesium ribbon

1171 words - 5 pages PlanningIn this experiment I am going to find out how concentration of acid affects the rate of reaction with magnesium ribbon.Equation for this reaction:Mg + 2HCl --> MgCl2 + H2PredictionIn this experiment I think the higher the concentration of hydrochloric acid the faster the reaction.Scientific knowledgeThe highest concentration reacts faster as the solution is more concentrated which means that there will be more particles in the

The Prognostic Importance of Heart Rate Variability

685 words - 3 pages 1.1. Heart rate variability: Heart rate variability (HRV) reflects the variations in the intervals between heart beats (R waves) over time. The time between two consecutive R waves is termed the R-R interval; it is measured in milliseconds, and is controlled by the autonomic nervous system 1. HRV is a non-invasive method for interpreting autonomic nervous system modulation and provides information relating to each branch of the autonomic nervous

How light intensity affects the rate of photosynthesis. (Measured by the amount of bubbles produced in 2 minuets)

2931 words - 12 pages Planning 6/6Analasis 6/8Implementation 6/8Evaluation 4/6NOTE:PICTURES AND DIAGRAMS FROM THE ORIGONAL ESSAY WILL NOT APPEAR SO THERE MAY BE UNXPLAINED GAPSHow light intensity affects the rate of photosynthesis.(Measured by the amount of bubbles produced in 2 minuets)Scientific Knowledge and UnderstandingCanadian pondweedThis is the pond weed we will be using. It is North American and widely naturalized in EuropePhotosynthesisPhotosynthesis - The

The Affects of Different Yeast on the Rate of Fermentation

1129 words - 5 pages AIM: To see how different yeast affect and influence the rate of fermentation, how much alcohol is being produced and how this affects the overall quality of wine produced. BACKGROUND INFORMATION: Alcohol, is mostly thought of as ethanol which is the alcohol which is found in alcoholic beverages such as wine and beer. But there are many different varieties of alcohol such as methanol, propanol and butanol. In chemistry terms

The Secrets of Caffeine

2000 words - 8 pages people should be informed what exactly caffeine is and how it affects them directly in terms of where caffeine can be found, the effects it has on the brain and the heart and also the pregnancy effects. Also, people should be provided with a general knowledge of how caffeine can play a part in someone’s life, and some steps to help slow down the consumption of caffeine. Caffeine is a stimulant of the central nervous system, so when people consume

The Effects of Caffeine

1236 words - 5 pages beneficial or harmful. Caffeine is a naturally occurring xanthine (precursor to uric acid often found in urine) used as a central nervous system (CNS) and respiratory stimulant, or as a mild diuretic. Other xanthine derivatives include the bronchodilator theophylline and theobromine, a compound found in cocoa and chocolate. Caffeine is a mild, but direct stimulant at all levels of the CNS that quickens the heart and

Investigating the Effect of Alcohol on Heartbeat of Daphnia

3425 words - 14 pages alcohol on the heart rate of Daphnia. My hypothesis was, as the concentration of alcohol increases the lower the heartbeat of the Daphnia will fall. To test my prediction I carried out 25 individual experiments which were all carried out using the same procedure but varying the alcohol concentration of the solution. To investigate how alcohol concentration affects the heartbeat of Daphnia I recorded the heartbeat of 25

Similar Essays

The Effect Of Ibuprofen On The Heart Rate Of The Daphnia (Crustacean Organism)

938 words - 4 pages Hard work, good literature Excellent detail and work effortAbstractThe project that I chose to research was the effect of Ibuprofen on the heart rate of the daphnia. The reason that I chose to do this was because many people in society use over the counter pain killers without really understanding any of the long term effects of this medicine other than clearing their aches pains, and swelling. One of the leading drugs on the market today is

Research Experiment Examining The Effect Of Caffeine On The Heart Rate Of Water Fleas

819 words - 3 pages wear goggles but I did wear a lab coat to protect my clothes if I spilt anything. Variables: In this experiment the independent variable was how much caffeine was being given to the water flea and the dependant variable was the flea’s heart rate. The control variables were how long the flea was in the caffeine, how long the heart rate was recorded for and the temperature the fleas were kept at. Results: Strength of caffeine Heart beats

Does Music Affects Human Heart Rate Biology Research Paper

557 words - 3 pages DOES MUSIC AFFECTS HUMAN HEART RATE Do you know that what a person listens to will affect his heart rate? Human heart beats at a different speed when listening to various kinds of music. To know about that, the three perspectives needed to know are the factors of music, the responses of the body, and from other experiments that other people have done. The first perspective is the factors of music that will affect the heart rate. One of the main

The Effect Of Caffeine In Daphnia

709 words - 3 pages [Escriba texto] [Escriba texto] [Escriba texto]David Ramos Rivero Biology ASTHE EFFECT OF CAFFEINE ON THE HEART RATE OF DAPHNIAIntroductionThe purpose of this experiment is to investigate the effect of caffeine on the heart rate of Daphnia (water fleas). Heart rate is defined as the number of beats per minute. Caffeine (C8H10N4O2) is a stimulant drug that is daily used by millions of people around the world to improve mental alertness and