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Pulse Rates

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Introduction

GCSE Practical Investigation Pulse Rates Introduction In this experiment I'm going to investigate pulse rates and the factors that affect pulse rates. Every time the heart or cardiac muscle contracts it registers a pulse. The pulse is caused by the action of the heart as it pumps blood throughout the body. Depending on the amount of blood pumped through the arteries, the arteries expand and contract and the blood being pumped through the arteries causes a pressure wave that you feel as your pulse. You can check your pulse in several places: * Just over the temple at the side of your head, this is known as the 'Temporal pulse'. ...read more.

Middle

I think this because the muscles contract at a faster rate during exercise meaning they will need more energy. The muscles get their energy from respiration, which uses glucose and oxygen, which is contained in the blood. To get the glucose and oxygen needed the heart will have to pump faster, causing the pulse rate to increase. Method I will work safely when carrying out the investigation by wearing sensible shoes, not exercising for too long a period, resting in between tests, warming up before exercising and exercising in a safe area. I will keep the test fair by accurate timekeeping, using an accurate stopwatch to carry out timing and use the same person to time each test to reduce human error. ...read more.

Conclusion

used up through respiration, this causes the heart to pump faster to produce more oxygen for respiration, to gain energy for the muscles. This why both pulse rates increased. Evaluation I think my experiment went very well as I have conclusive results that show pulse rates increase according to the amount of exercise performed. To improve my experiment I could have performed the experiment more than once, measured the pulse rates with a computer and made sure both people did the exercise at the same pace. Although my results prove that pulse rates depending on the amount of exercise performed, I think that if the exercise amount stayed the same the pulse rate would stay the same, because energy would be used up at the same rate. Jack Rankin ...read more.

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