Final answer:
B) False, any cell in the myocardium is not capable of initiating an impulse. The specialized myocardial conducting cells are responsible for initiating and propagating the electrical impulse in the heart.
Step-by-step explanation:
B) False, any cell in the myocardium is not capable of initiating an impulse.
The myocardial conducting cells, also known as pacemaker cells, are responsible for initiating and propagating the electrical impulse that travels throughout the heart and triggers the contractions.
These specialized cells are self-excitable and able to depolarize to threshold and fire action potentials on their own, a feature called autorhythmicity.
They are connected with gap junctions to surrounding muscle fibers and the specialized fibers of the heart's conduction system, allowing them to transfer the depolarization to the other cardiac muscle fibers in a coordinated manner.