• 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

    The Effects of Exercise on the Heart Rate

    4 star(s)

    As a result the heart rate would rise. Due to the increased intake of oxygen and heart rate the rush of oxygen and glucose to the muscles promotes oxidation of the lactic acid into CO so that it can be carried away.

  1. Human biology short notes

    and pH * Temperatures above 45o C denature the enzyme * High temperatures and pH destroy the active site and enzymes can no longer combine with substrate to form a complex *The maximum temperature/ pH, at which the chemical reaction is accelerated is called the optimum temperature/pH Importance of enzymes

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

    * Body exercises * Muscles respire more * Carbon dioxide level in blood increases * Chemoreceptors in aorta (near heart) and carotid body (in neck) monitor carbon dioxide level * Nerve fibres * Medulla oblongata (responds to changes in carbon dioxide level)

  1. How does exercise affect your heart rate?

    * Once my heart rate has returned to its normal heart rate I will repeat the exercise and the steps above twice more waiting in between each set for my heart rate to return to its resting rate. * When I have finished collecting my data I will work out the averages and analyse my data.

  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. 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.

  2. Experiment to Investigate Factors Affecting the Rate of Respiration in Yeast

    Which is the best surface area for the yeast? I decided that I would use a 1 gram ball of yeast, as this would mean that no matter how many shapes I tried the sphere would have the largest surface area. This is because whereas the cube has corners on it, which do not have a surface area, the

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