Humans as Organisms

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Humans as Organisms Coursework

  • Trends and Patterns

The trend of my graph is an upward trend starting with the first point at 93 beats (b)/min then after 30 seconds of exercise my pulse rate increased by 82 b/min to 175 b/min. It then increased again to 196 b/min, which is an increase of 21 b/min. After 90 seconds of exercise my pulse rate was 205 b/min and after 120 seconds it increased to 244 b/min which is an increase of 39 b/min. This suggests a positive correlation between exercise duration and pulse rate, where correlation indicates the extent to which two variables are related.  

  • Analysis

My graph shows that during exercise your pulse rate increases. This is due to when you exercise you need more oxygen to feed your working muscles giving them the energy to contract. As this happens, an increase in cardiac output is required to pump and supply this oxygen, consequently making your heart beat faster. This process is called aerobic respiration, where the term aerobic refers to work with the presence of oxygen.

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I hypothesised this would happen because I know thoughout my sporting history, the longer you exercise, the more times per minute your heart beats so I can conclude that when you exercise, blood must get from the heart to the rest of your body, consequently your heart beats more times per minute. This increases along with the duration of exercise as is noted from the results of this experiment

  • Evaluation

The only problem I had was obtaining the data in one lesson and as the collection was spread out over more than one lesson, the results may be ...

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