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An investigation into pulse rates

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Introduction

Monday, December 16, 2002 Jack Jackson An investigation into pulse rates Introduction A pulse is the stretching of an artery each time your heart beats. So a pulse is the blood being pushed around our bodies and we can feel it when the veins are close to our skin. The atria contract and they squeeze the blood into the ventricles, then the ventricles then contract pushing the blood into the arteries. The valves in the heart make sure the blood flows the right way and this is what we feel around our body as a pulse. Anaerobic respiration occurs when the diffusion of oxygen and carbon dioxide in the alveoli can't keep up with the amount we need. This happens when the trachea divides into two tubes called the bronchi which divide again several times, to form the bronchioles which continue to divide until they end as air sacs called alveoli there are millions of these in our bodies. Which are very close to the blood capillaries and here carbon dioxide diffuses from the blood into the alveoli, oxygen then diffuses from the alveoli into the blood. ...read more.

Middle

When lactic acid builds up it causes fatigue, aches, pains and cramp. The word equation for this is:- Glucose Energy + Lactic Acid I predict that in my group we will all be fairly fit as we all participate in sport. I also believe we eat fairly well and this will be in our favour as it is strengthening our vascular system and making us healthier then people who eat fatty foods. But I think Jack will be the fittest followed closely be Matthew and Sean in a respectable last position. I will go about collecting my results by making my group exercise vigorously for one minute. They will do this by sprinting up and down a corridor. But before they have even started the exercise I am going to take their resting pulse after I have taken their resting pulse I will time them for one minute while they exercise. After one minute is up I will take their pulse for a further six minutes to see how their pulse rate is effected and how fit they are. ...read more.

Conclusion

the resting rates of the people in my group and the pulse rates of them after they have exercised for one minute. Also attached to this page are my results of each person on a graph for easier reading. Conclusion I can see that Jack is the fittest as his pulse rate went started high and decreased steadily down inside the six minutes. This is because he was able to supply his muscles and body with oxygen and energy and shows he has a good vascular system. Most of the people that took part in the investigation were fairly fit but Jack was the fittest then Matthew who had the same pattern as Jack but it was a little higher and Sean came a respectable last as his pulse rate rocketed to a whopping 160 beats per minute and then steadily decreased but rose towards the end. This has shown my prediction to be correct as I said Jack would be the fittest with Matthew and Sean behind him. I chose this prediction as he participates in a lot of sports and eats a lot of vegetables. ...read more.

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