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Which factors affect the human heart rate?

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Introduction

GCSE Biology Coursework Which factors affect the human heart rate? Brainstorm to show the research into what affects your heartbeat! Shocks Exercise Your age Meals Fatty foods Diet Smoking Jogging Holding your breath Stress Your heart pumps blood around your body. Every time the heart beats it pushes a 'surge' of blood down your arteries. You can feel this surge of blood as a pulse. Your pulse rate is the number of pulses you can count in one whole minute. Your pulse rate tells you how frequently your heart is beating. You can take someone's pulse by putting your fingertips against a pulse point and counting the pulses for one minute. In the experiment I will be counting for 15 secs, because otherwise the pulse will be back to normal by the time you start to exercise again. But I will then times by 4, which will give me an average heartbeat per minute. Your blood carries oxygen and glucose to your cells. The cells use the glucose and oxygen for respiration. Respiration is when the energy that our bodies' need is released from our food, releasing this energy is Respiration, which happens in every cell in our body. The food is usually glucose otherwise known as sugar, but other foods may be used. This can be written as an equation: Glucose + oxygen ---------- Water + Carbon dioxide + energy This energy that is released is needed by the muscles to move over body, that is why the heartbeats and increases like it does. ...read more.

Middle

(3 different results for each minute0 8. When you have completely finished times each result by 4 this will allow you to get the beats per minute. Results Average (working out) Average Resting 20 21 25 20+21+25=66/3=22 22 1min 20 24 18 20+24+18=62/3=20.66 20.66 2min 22 23 19 22+23+19=64/3=21.33 21.33 3min 24 21 24 24+24+21=69/3=23 23 4min 25 20 20 25+20+20=65/3=21.66 21.66 5min 26 22 23 26+22+23=71/3=23.66 23.66 Resting 23 17 18 23+17+18=58/3=19.33 19.33 This table on the previous page shows the pulse rates after 15 secs, I will now conduct a table of pulse results after 1 min. Attempt 1 Attempt 2 Pulse per min Resting 20 20*4=80 1min 20 20*4=80 2min 22 22*4=88 3min 24 24*4=96 4min 25 25*4=100 5min 26 26*4=104 Resting 23 23*4=92 Pulse per min Resting 21 21*4=84 1min 24 24*4=96 2min 23 23*4=92 3min 21 21*4=84 4min 20 20*4=80 5min 22 22*4=88 Resting 17 17*4=68 Attempt 3. Pulse per min Resting 25 25*4=100 1min 18 18*4=72 2min 19 19*4=76 3min 24 24*4=96 4min 20 20*4=80 5min 23 23*4=92 Resting 18 18*4=72 So from the 3 above tables you can see I have worked out the Pulse rates per minute. I worked this out using the following equation (PULSE*4=) The reason I times the pulse result by 4, is because it was 15 secs which was 1/4 of a minute, so I need for of them so I times by 4. ...read more.

Conclusion

Yes I believe I did gather enough results to judge my prediction, as my prediction was correct but it would of helped if the results I gathered were more accurate. Further investigations that I could carry out to investigate the heartbeat could be that I could experiment using a person who smokes, to carry out the exercising. As we have already identified when researching into this topic of "Factors, which affect heartbeat" so this could give us some clearer results. If I carried out this experiment using a smoker, then I predict that the results would be lower than the ones I have now, as the person I used was a non-smoker in very good health. I could also use people who are slightly overweight, who smoke, very thin. I could even completely change my experiment and carry it out so someone holds his or her breath instead of exercising. Conclusion From this experiment I haven't really found anything out, I have just confirmed what I already knew. Which is "After exercising the pulse and heartbeat will get faster, as the blood is needed to be pumped around the body a lot quicker, as the muscles are in constant use, and they need the glucose which is carried in the blood." So I have found out that the faster the heart beats then the more oxygen is breathed in and the faster your heart beats to help transport this oxygen and glucose which are in the blood to all the working muscles around your body. By Lucy Nicholson. ...read more.

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