The excitatory signal generated by the cardiac pacemaker spreads from fiber to fiber via
A) gap junctions.
B) tight junctions.
C) gated channels.
D) desmosomes.
E) sodium-potassium channels.

Question

Quizplus · Accepted Answer

Gap junctions allow for the rapid spread of action potentials from cell to cell in cardiac muscle tissue, ensuring that the heart contracts as a coordinated unit.

The Excitatory Signal Generated by the Cardiac Pacemaker Spreads from Fiber