[Campbell Biology P.977] Based on the provided text, which of the following statements about... | Practice Question
Based on the provided text, which of the following statements about the regulation of heart rate is FALSE?
A: An increase in body temperature by 1°C typically causes a decrease of about 10 beats per minute in heart rate.
B: The sympathetic division of the nervous system can increase heart rate, while the parasympathetic division can decrease it.
C: Hormones like epinephrine, secreted by the adrenal glands, can speed up the pacemaker.
D: Autorhythmic cells can contract without external signals, but their coordination in an intact heart relies on specialized nodes.
Explanation
The text explicitly states: 'An increase of only 1°C raises the heart rate by about 10 beats per minute.' Therefore, a 1°C increase in body temperature leads to an increase in heart rate, not a decrease.