All of the following statements regarding the hea are true Except
The sinoatrial node receives a nerve supply; however, this node initiates the heabeat autonomously. The autonomic innervation modulates the rate of depolarization of the sinoatrial node, thereby modulating the hea rate. The sinoatrial node is composed of specialized cardiac muscle cells that depolarize spontaneously at a greater rate than that of other cardiac muscle cells. Because cardiac muscle cells contact each other electrically through gap junctions at the intercalated discs, the depolarization of the sinoatrial node drives the other cardiac muscle cells of the atrium to depolarize at the same rate as the node.
The nerve fibers that conduct the pain associated with ischemia accompany the sympathetic nerve supply to the hea
The sinoatrial node does not receive a nerve supply and thus initiates the hea beat autonomously
The atrioventricular node is located in the interatrial septum
The diaphragmatic surface of the hea is composed primarily of the left ventricular wall
Thorax