Which of the following statements is false?
A)A heart will stop beating when the nerves to the heart are severed.
B)Some cardiac muscle cells are self-excitatory.
C)The pacemaker of the heart is the sinoatrial node.
D)Cardiac muscle cells have numerous gap junctions on their sides to allow rapid communication.
E)Cardiac muscle cells of the two ventricles contract essentially in unison.

Question

Quizplus · Accepted Answer

The statement that a heart will stop beating when the nerves to the heart are severed is false. While the nervous system can influence heart rate and rhythm, the heart also contains self-excitable cells that can initiate and propagate electrical impulses even in the absence of nervous input. This is why a heart transplant can still be successful even if the nerves to the heart are not perfectly reconnected.

Which of the Following Statements Is False