The human heart ____.
A) contracts as a result of electrical stimuli from the sinoatrial node
B) contracts only as a result of nerve stimulation from the central nervous system
C) is activated primarily through the autonomic nervous system
D) contracts as a result of electrical stimuli from the atrioventricular node
E) is independent of all nervous control

Question

The human heart ____.
A) ​contracts as a result of electrical stimuli from the sinoatrial node
B) ​contracts only as a result of nerve stimulation from the central nervous system
C) ​is activated primarily through the autonomic nervous system
D) ​contracts as a result of electrical stimuli from the atrioventricular node
E) is independent of all nervous control​

Quizplus · Accepted Answer

The sinoatrial (SA) node is the natural pacemaker of the heart and generates electrical impulses that spread throughout the heart and cause it to contract. This process is independent of nervous control.

The Human Heart ____