• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To investigate the factors affecting your pulse after consuming caffeine.

Extracts from this document...

Introduction

SC1 Aim: To investigate the factors affecting your pulse after consuming caffeine. Prediction: In my science experiment/project I predict that the more caffeine that is consumed, the higher the pulse rate will be. I think this because at a low intake (less than 100mg caffeine in one drink) the effects will be minimal, but higher intakes (greater than 200mg) can produce changes in heart rate and blood pressure. This leads me to think that the more caffeine consumed results in a higher pulse rate. Coke drinks contain about 35 mg caffeine per standard 280 ml serving, with some 5% of the caffeine being a component of kola nuts and most of the remainder being added in the form of a by-product of the decaffeination of coffee and tea In the heart, this response prompts norepinephrine--also called noradrenalin--and a related neurotransmitter, epinephrine, to increase the rate and force of the muscle's contractions. Although the two act in concert, norepinephrine is released by sympathetic nerves near the pacemaker tissue of the heart, whereas epinephrine is released primarily by the adrenal glands. ...read more.

Middle

I propose to do each of the tests at least three time and take an average. I will record the results of my pulse and then plot a graph. THINGS I NEED TO DO TO MAKE IT A FAIR TEST: 1.) Measure the amounts of coke accurately by using a measuring cylinder of an appropriate size. 2.) Measure the amount of hot water I will consume for the coffee 3.) Always wait for my pulse to go back to resting before starting the next test. 4.) Using the type of coffee and coke all the time. 5.) Use an electronic pulse meter to give me more accurate results than counting the heart beat yourself APPARATUS: 2 litre bottle of coke which contains caffeine, Accurate measuring cylinders (appropriate size), 1 stop clock, Paper and pencil to record down the results. SAFETY: 1.)Make sure that the measuring cylinders and the cups are completely sterile, to make sure that you don't get ill. 2.) No running around the science lab, because you could trip and hurt yourself. ...read more.

Conclusion

For example to get a better result I would have done the experiments another three times to get a much better average if I had had the time. On the graph there was an anomalous result for 150cm3 as shown. This may have been an error in my counting of my pulse, or there may have been slightly too much coke that experiment. To have made the measurements even more accurate I could have used a burette because it would have given a much more precise measurement. To improve the accuracy of pulse rate a medical heart rate monitor would have been more accurate. Because of the constraints of time it was not possible to take all the readings in the same lesson period. The smaller quantities were taken during a lesson after morning break (during which I had eaten), which the larger volumes were consumed during a lesson before lunch when my stomach was empty. The varying presence of food in my stomach could alter the absorption of the caffeine into the blood stream. Taking all these factors into account the results obtained gave a satisfactory correlation between pulse rate and amount of caffeine consumed. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Humans as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Humans as Organisms essays

  1. Factors Affecting the Development of Coronary Heart Disease.

    * The word 'coronary' means crown, and it is the name given to the arteries that circle the heart like a crown. The coronary arteries supply the heart muscle with oxygen and nutrients. * Coronary heart disease develops when one or more of the coronary arteries that supply the blood to the heart become narrower than they used to be.

  2. INVESTIGTING THE EFFECT OF CAFFEINE CONCENTRATION ON

    Safety- * A laboratory coat should be worn at all times to reduce any risk of direct harm to the body * Hands should be washed before the experiment so that any unwanted substances are not transferred during the experiment.

  1. Daphnia project.

    The reason for this will be because as an ectothermic organism, its body temperature will also be rising with no ability to control it. Another reason for increased heart rate is enzyme activity. The chemical reactions in the body will happen faster due to the increased temperature, consequently the heart

  2. To investigate the reaction time and the factors affecting them

    The eyes are sense organs that respond to light and they contain specialized cells called Photoreceptors. They are light sensitive and form an image on the retina. Colored light/ image can only be pictured because of the Cones present at the Fovea.

  1. Factors Affecting the Fitness of an Individual

    Repeat steps 6 - 7 for both the Subjects. 22. Record your readings and organize them in tabular form. 23. Repeat the Program if necessary. * The Intensive Exercise Program is to be conducted Three times a week and for 2 weeks.

  2. The need for emergency life support

    If there are no signs of a circulation, or you are at all unsure, assume that the heart has stopped. This is called cardiac arrest. The casualty will be unconscious and may appear very pale, grey or bluish in colour.

  1. To investigate the effect of Caffeine / Nicotine on reaction times.

    Should they do so a bell sounds. Such an apparatus was used to determine the time taken for individuals to make three contacts with the wire. Those who reach the end of the wire without sounding three bells must return along the path and continue until the third bell is reached.

  2. Investigation into the effects of caffeine on pulse rate.

    Caffeine works by changing the chemistry of the brain. It blocks the action of a natural brain chemical that is associated with sleep. As adenosine is created in the brain, it binds to adenosine receptors. The binding of adenosine causes drowsiness by slowing down nerve cell activity.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work