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

Biology heart rate Planning

Extracts from this document...


Biology Lab Report by Abdullah Shaikh Factors affecting the Physiological condition of the body (C2, C3, C4) Aim: to investigate the effect of temperature on heart rate of an individual during endurance exercise Introduction: Heart rate is the number of heartbeats per unit of time. It is usually measured in beats per minute (bpm). The human heart is a muscular organ responsible for pumping blood into the blood vessels of the body by repeated rhythmic contractions. This is how typically the human heart functions. The right side of the heart is responsible for carrying deoxygenated blood used by the body. Deoxygenated blood is collected in the right atrium and through the right ventricle it is pumped into the lungs where gaseous exchange occurs. Blood absorbs oxygen from the alveoli and Carbon dioxide is given out of the body. This oxygenated blood is pumped by the left ventricle to the different parts of the body through the aorta. The oxygen is absorbed by body cells to produce energy by respiration, which is needed for metabolism. ...read more.


Physical fitness and stamina of an individual is important in determining his heart rate. A person who exercises regularly has a lower heart rate than an unfit person. After exercise the heart rate of the trained person comes back to normal faster Hypothesis: As the environmental temperature increases the heart rate too increases. As the outside temperature increases the core body temperature too increases. Due to this metabolism occurs at a faster rate in body cells, which causes the heart rate to increase. However, during extreme cold conditions the heart rate too increases. In cold conditions we start shivering and our core temperature increases. Due to uncontrollable muscular activity the energy requirement to maintain the core temperature increases and so the heart rate too rises. Independent variable: the ambient temperature during exercise Dependant variable: the heart rate after exercise, time taken for the heart rate to return to normal Controlled variables: altitude, humidity, distance to be covered while sprinting, time taken for the sprint, VO2 max, physical fitness and stamina of the individual, energy consumption before sprint Fair test: I will control my variables in the way. ...read more.


I will take results at 16?C, 25?C and 35?C. For 35?C on a hot afternoon I will turn off the air conditioner and put on the night lamps, which have a heating effect. Apparatus; 1. Device to cool the room, air conditioner 2. Jogging track 3. Stethoscope 4. Stopwatch ? 0.1 sec Method: 1. Make the temperature of the room 16?C by adjusting the air conditioner 2. Record your normal heart rate either by feeling your pulse or using a stethoscope. 3. On the jogging track mark a distance of 200m to be covered 4. Carry a stopwatch while running and try to estimate and time your run in approximately 30 seconds. 5. After the distance is covered tell someone to help you measure your heart rate either by feeling your pulse or using a stethoscope. 6. Note down the heart rate immediately after the sprint is over 7. Keep measuring the heart rate at regular intervals and note down the time taken for the heart rate to return to normal 8. Carry out steps 2 to 7 with controlled temperatures of 25?C and 35?C ...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

Here's what a teacher thought of this essay


A good start, however your experiment is not very clear on what you are measuring. Is it the maximum heart rate during exercise at different temperatures or heart rate after exercise at varying temperatures or recovery time after exercise at varying temperatures?

The theory side is okay but you missed the key point linking exercise and heart rate together; it is the need for a higher rate of respiration to deliver the heightened demand for energy of the muscles.

Marked by teacher Jon Borrell 08/01/2013

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

    Biology Revision notes - Human Biology

    5 star(s)

    before they start to respire anaerobically because they have run out of oxygen * The higher the value of VO2 max, the better the heart and blood are at supplying oxygen to the muscles. Heart Disease Heart and circulatory disease is the UK's biggest killer.

  2. Marked by a teacher

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

    4 star(s)

    Nerve impulses from the brain also increase heart rate during exercise. As we exercise and our muscles respire more, more carbon dioxide is produced. Chemoreceptors in the carotid artery detect a change in blood pH due to an increased concentration of carbon dioxide and these send impulses to the brain.

  1. How does exercise affect your heart rate?

    * As soon as I have completed my exercise I will take my heart rate by placing two fingers on my wrist and counting the pulses. * I will then record my results. * I will check my current heart rate every minute until it returns to its resting heart rate.

  2. Investigation into the effect of exercise on Heart Rate.

    Each higher than the last except for number 5 which was lower than number 4. I think this is because after jogging for a while you build up a steady jog and you heart doesn't need to pump as fast because you are not as tired out.

  1. Human biology short notes

    * Many vital chemical reactions takes place inside the body * Enzymes are needed to speed up the rate at which the chemical reactions occur * If enzymes are not present or denatured, chemical reactions will occur slowly * For chemical reactions to take place without enzymes high temperatures are

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

    * As I am going to conduct the experiment under anaerobic conditions (refer to 2nd bullet point in justification) I will use a 20ml syringe to draw up the solution made up of 1% yeast and 2% respiratory substrate and remove any excess oxygen in the syringe by pushing the solution to the very end of the syringe.

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

    This increase in toxic carbon dioxide concentration is detected by chemoreceptors in two areas of the body- in arteries in the neck, and in the aorta (near the heart). Central chemoreceptors in the medulla itself are also stimulated by the increased carbon dioxide concentration in the blood.

  2. The process of gaseous exchange at the lungs and the muscles and the effect ...

    to form haemoglobinic acid. Once the oxygen has been displaced it is then free to diffuse into the muscle tissue to then ultimately be used for the production for ATP as a source of energy. Exercise has a large effect on the repertory system, the main change being the volume and capacity of our breaths.

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