The Heart Rate Of An Animal Essay

794 Words Feb 3rd, 2016 4 Pages
Introduction:
The heart rate of an animal can be used as an indicator to identify when a stimulus evokes a reaction from the animal. Specifically in the case of humans’, there tends to be the cognitive ability to physically withhold a reaction from a stimulus and mask the involuntary reaction. However, the heart rate reacts immediately after a stimulus, and is not reigned in or controlled cognitively, so could the heart potentially be a true indicator of an individuals reaction to a stimulus?
The experiment that Life 103 L23 designed, recorded the heart rates response to an unknown fear stimulus and analyzed how strongly the heart reacted to the stimulus compared to a basal reading; as well as analyzing how much time elapsed after the stimulus for the heart to return to the region of the basal reading. The experiment also tested the physiologic response to the same fear stimulus for a group of individuals who knew the fright was impending, and analyzed the same data in comparison to the individuals who did not know when the fear stimulus would occur.
The hypothesis for the experiment was that an unknown fear stimulus would cause an increase in heart rate, diastolic, and systolic blood pressure, while a known fear stimulus would not affect or generate a physiologic response.
The null hypothesis for the experiment was that the fear stimulus would not cause an increase in heart rate, diastolic, and systolic blood pressure; therefore the fear stimulus would not evoke any…

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