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

The aim of this experiment is to investigate the effect exercise has on the pulse rate. The pulse rate is defined as 'The rhythmical throbbing of arteries produced by the regular contractions of the heart'.

Extracts from this document...

Introduction

The aim of this experiment is to investigate the effect exercise has on the pulse rate. The pulse rate is defined as 'The rhythmical throbbing of arteries produced by the regular contractions of the heart'. I will attempt to conduct my investigation in a safe manner by having an adult and a first aid kit nearby in case of any accidents. In addition the experiment shall be performed in an open space to avoid damage to other equipment or myself. Suitable clothing shall be worn to prevent hazards from occurring. I predict that the pulse rate during exercise will increase. This is because during exercise the muscles of the body are contracting faster and therefore need more oxygen to be satisfied. This will increase the pulse rate, as the heart will have to pump more blood at larger volumes at a faster rate. As a result there would be an increase in the amount of carbon dioxide (CO2) produced because it is a bi-product of respiration. ...read more.

Middle

However the individual heart muscle cells cannot be allowed to contract at their own rhythm as if they did parts of the heart would contract out of sequence with other parts and the sequence of the cardiac cycle would become disordered, and the heart would stop working as a pump. The cardiac cycle is started by a specialized patch of muscle in the wall of the right atrium, called the sinoatrial node (SAN) or pacemaker. The muscle cells of the SAN set the rhythm for all the other cardiac muscle cells. They have an inbuilt rhythmic contraction, which is slightly faster than the rest of the cardiac muscle. When they contract a wave of excitation spreads from the atrium to the ventricles. The excitation spreads from the atrium to the ventricles. The excitation waves spread outwards and upwards through the fibres at the base of the heart and makes the ventricles contract. When this occurs, it causes the cardiac muscles in the walls to contract, from the bottom up, so squeezing blood upwards from the ventricles and into arterioles, in order for the blood to be delivered to the needy cells. ...read more.

Conclusion

Referencing: during class time, I did a quick practical test, where I had to jog on the spot for a minute and immediately take the pulse rate. In addition, I have also studied about the heart in lesson time and private study. This enabled me to get an overall picture of the experiment. THE METHOD The experiment will take place when resting pulse rate has been identified. The individual will step up on to the platform and step down as many times as possible in one minute increments up to five minutes. Between each increment the individual will sit down and rest for one minute. After each increment I will measure the individuals pulse from their neck. I will conduct the experiment three times to get a more accurate set of results and then take the average result for each time. The fixed variables in this experiment I have identified are: 1) Time duration of exercise 2) Platform height 3) Platform location 4) Room temperature 5) Clothing worn The independent variable will be the time lengths of exercise. The dependant variable will be the pulse rate. BENITO SEGARAJASINGHE THE EFFECT OF EXCERISE ON THE PULSE RATE 11NI 1 ...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. Marked by a teacher

    Artificial Cardiac Pacemakers

    5 star(s)

    31 They have been in use for 40-50 years, thus there has been a great deal of technological advancement.32 The first internal pacemaker was implanted into a patient in October, 1958.33 Remarkably, this patient is still alive now.34 These pacemakers can still malfunction, however it is very unlikely, and as technology progresses, reliability of these devices will also progress.

  2. Marked by a teacher

    Design an Experiment to show how exercise can affect Heart Rate in Humans.

    4 star(s)

    Firstly, for this particular experiment, more people, more replicates (such as 3 times at each number of steps) and a greater range of number of steps (such as 2, 4, 6, 8, ...50 steps) would increase the reliability of the results and would produce a more accurate graph.

  1. Marked by a teacher

    The effect of different sugar substrates on the rate of yeast respiration

    4 star(s)

    * 25 cm� of 2% Sucrose- This will be used as one my respiratory substrates. * 25cm� of 2% Galactose- This will be used as one my respiratory substrates. * 25cm� of 2% Fructose- This will be used as one my respiratory substrates.

  2. Marked by a teacher

    Investigating the effect of exercise on the heart rate and recovery time.

    3 star(s)

    Heart rate during exercise (beats per min) Recovery time (min/sec) and (sec) 20 122 1:34 / 94 40 138 1:77 / 137 60 150 2:51 / 171 80 166 5:16 / 310 100 172 6:10 / 370 CONCLUSION From the graphs I can see that the longer the distance run the higher Marks heart rate was and the recovery time was longer.

  1. To investigate how the heart rate and breathing rate increase with exercise.Scientific KnowledgeAerobic respiration ...

    This organ is part of the brain and it continually monitors the temperature of the blood flowing through it. In addition it receives information from about 160000 temperature receptors found in the skin. The hypothalamus uses this information on blood and skin temperature to alter the levels of sweating, blood flow in the skin and shivering.

  2. Human biology short notes

    of hankies * BCG test to see if infected Treatment of infected by vaccination * Good ventilation * Isolation of the infected * Avoid overcrowded areas Treatment * Antibiotics -:Streptomycin * Careful nursing * Good ventilation * Improved diet (high in protein)

  1. An experiment to investigate the rate of anaerobic respiration of yeast in various respiratory ...

    Volume CO2 Produced (cm3) 0 0 0 0 0 0 0 0 0 0 0 3 0.2 0.3 0.1 0.1 0.2 0.1 0.2 0.1 0.3 0 6 0.3 0.5 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.2 9 0.3 0.7 0.3 0.4 0.4 0.3 0.3 0.2 0.4 0.3 12 0.4

  2. Should the cloning of humans be allowed?

    them die before birth; the deaths caused in many cases by a malformed placenta. This prevents the growing foetus from collecting enough oxygen and nutrition. 1 Other Problems with Cloning And even if the clones do manage to be born alive, some of them die soon of organ failure.

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