Physiology Lab 3 Activity 2 Essay

715 Words Nov 1st, 2014 3 Pages
1) Make a graph of resting heart rates from Activity 1. Provide a physiological explanation for fluctuations in resting heart rate over time. Discuss a couple of extrinsic factors that influence the autonomic nervous regulation of resting heart rate.
The resting heart rate fluctuates over time because it is under control of the autonomic nervous system and the fluctuations are a result of the sympathetic and parasympathetic systems trying to balance each other out.
There are many reasons on why the resting heart rate can fluctuate over time. Factors can include things like the temperature of the room we were in, or what we ate/ drank for breakfast. Also volume of liquid or chemicals in the cell can impact the heart rate.
2)
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Homeostatic is all about balance so when you begin to exercise, you need more oxygen. The harder you breathe the more energy it takes to replace it. Your body temperature while exercising also increases; typically it creates too much heat so your body has to figure out a way to release the heat so it doesn't become dangerous. This is done by sweating
4) Compare and contrast oscillations in heart rate observed at rest (Activity 1), during exercise and recovery exercise (Activity 2). Is the relative magnitude of the oscillations the same? Provide a physiological explanation in your answer.
In the first experiment I was subject 2. For the most part my heart rate did not oscillate too much. My heart rate was a little slower than the other subjects as well. Compared to Activity 2, his oscillations while exercising were a little more dramatic. The reason for this could be that your heart is trying to adjust to the new physically taxing activity that you are enduring. Your body is trying to balance, but if it is thrown into a demanding activity it will take a little bit more adjusting than if you are just resting.
5) Describe how the normal range for any given measurement is obtained. Explain why published values for normal ranges may differ and why these values must be continually checked and updated.
There really is no "ideal" reading for any measurement, it really just varies depending on your diet

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