Indicate the effects of a 10oC degree change on heart rate i

Indicate the effects of a 10oC degree change on heart rate in isolated hearts. In doing so, indicate the x-fold change and, using information provided in the laboratory manual (Question 4 in the post-lab questions), indicate the x-fold change in heart rate caused by a 10oC change. What does this result indicate with regards to the causes of the heart rate changes

Solution

Body temperature is an independent determinant of heart rate in isolated hearts. Heart beat changes approximately 10 beats per minute per degree centigrade. So, a 10 degree centigrade change in temperature changes heart rate by 100 beats per minute. This result indicate that temperature is an independent determinant of heart rate in isolated hearts.