Your Observations of Cooling and Warming the Beating Frog Heart

Question

Your observations of cooling and warming the beating frog heart include which of the following?
A) Warming the heart has no effect on heart rate.
B) Cooling the heart has no effect on heart rate.
C) Heart rate is very sensitive to temperature: it slows with cooling and beats faster with warming.

Accepted Answer

Heart rate is indeed very sensitive to temperature changes. Cooling the heart will slow down the heart rate, while warming it up will increase the heart rate. This is due to the effect of temperature on the metabolic processes that drive heart function.