Which of the following decreases the heart rate?

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

Heart Rate

The number of heartbeats per unit of time, usually measured in beats per minute (bpm), indicative of cardiovascular health and physical condition.

Parasympathetic Nerve

A part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity.

Sympathetic Nerve

A part of the autonomic nervous system that generally stimulates the body's fight or flight response.