Does Caffeine affect Heart Rate?
Summary
In this experiment I investigated if caffeine affect heart rate. I took 4 different concentration on caffeine and gave me to daphnia (water flea). I measured the heart rate of theses water flea and found out that caffeine does affect heart rate in daphnia and also the higher the concentration of caffeine the greater the increase in heart rate.
Introduction
Hypothesis: The more caffeine add to the Daphnia the quicker the heart rate will be.
Caffeine is a natural product produce in leafs and seeds of plants as an insecticide. Caffeine is medically know as trimethylzanthine and in pure form is a white crystalline powder. However the main way to consume caffeine is through drinks such as coffee and tea which are see as "pick me up" drinks and also cola, all have caffeine in them. Caffeine is also used in medicines in aspirin preparations and is also found in weight-loss drugs and also other drinks to keep you a wake such a red bull or pro-plus. Caffeine acts as a stimulant drug.
How caffeine works
The brain produces a chemical called adenosine. Adenosine blinds to the adenosine receptors in the brain and this slows the nerve cell activity down which leads to tiredness. However Caffeine looks like adenosine to the nerve cell and it blinds to the caffeine but the caffeine does not slow the cell down but increases activity in the cell. This stimulates the central nervous system therefore increasing heart rate. It can also constrict blood vessels in the brain and this reduces the amount of blood flow in the brain and this is why caffeine is used in Anacine to relive vascular headaches. Caffeine however is a drug and is addictive. If take in large amounts over a long period of time you can become addicted to it. There are also other long term affects of caffeine. One of the most important long term problems is the effect caffeine has on sleep. The andronice receptors are very important to sleep espieaclly deep sleep. The caffeine stops people getting enough deep sleep therefore when they wake up and through out the day then need more caffeine to keep them a wake and therefore the cycle starts again.
Summary
In this experiment I investigated if caffeine affect heart rate. I took 4 different concentration on caffeine and gave me to daphnia (water flea). I measured the heart rate of theses water flea and found out that caffeine does affect heart rate in daphnia and also the higher the concentration of caffeine the greater the increase in heart rate.
Introduction
Hypothesis: The more caffeine add to the Daphnia the quicker the heart rate will be.
Caffeine is a natural product produce in leafs and seeds of plants as an insecticide. Caffeine is medically know as trimethylzanthine and in pure form is a white crystalline powder. However the main way to consume caffeine is through drinks such as coffee and tea which are see as "pick me up" drinks and also cola, all have caffeine in them. Caffeine is also used in medicines in aspirin preparations and is also found in weight-loss drugs and also other drinks to keep you a wake such a red bull or pro-plus. Caffeine acts as a stimulant drug.
How caffeine works
The brain produces a chemical called adenosine. Adenosine blinds to the adenosine receptors in the brain and this slows the nerve cell activity down which leads to tiredness. However Caffeine looks like adenosine to the nerve cell and it blinds to the caffeine but the caffeine does not slow the cell down but increases activity in the cell. This stimulates the central nervous system therefore increasing heart rate. It can also constrict blood vessels in the brain and this reduces the amount of blood flow in the brain and this is why caffeine is used in Anacine to relive vascular headaches. Caffeine however is a drug and is addictive. If take in large amounts over a long period of time you can become addicted to it. There are also other long term affects of caffeine. One of the most important long term problems is the effect caffeine has on sleep. The andronice receptors are very important to sleep espieaclly deep sleep. The caffeine stops people getting enough deep sleep therefore when they wake up and through out the day then need more caffeine to keep them a wake and therefore the cycle starts again.
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This is a well researched report that covers the required aspects. 1. The background knowledge needs to be referenced. 2. The procedure is well detailed. 3. The results table is well presented. 4. The conclusion is well justified. 5. The report is missing an evaluation. ***
