Which of the following does not cause an increase in the heart rate?

A) Strenuous exercise
B) Elevated body temperature
C) Parasympathetic nerve stimulation
D) Sympathetic nerve stimulation
E) Low concentration of potassium ions

Parasympathetic Nerve

Nerves that are part of the autonomic nervous system, responsible for conserving energy and slowing down bodily functions.

Sympathetic Nerve

Part of the autonomic nervous system that prepares the body for stress-related activities, often described as the "fight or flight" response.

Potassium Ions

Charged particles of potassium that are essential for various physiological processes in the body, including nerve signal transmission and muscle contraction.