As the impulse from the SA node spreads across the atria, it is prevented from stimulating the ventricles
A) SA node.
B) AV node.
C) tricuspid and bicuspid valves.
D) semilunar valves.
E) by the fibrous cardiac skeleton.

Question

Quizplus · Accepted Answer

The fibrous cardiac skeleton acts as an insulating barrier, preventing the impulse from the SA node from directly stimulating the ventricles. This ensures that the atria and ventricles contract in a coordinated manner.

As the Impulse from the SA Node Spreads Across the Atria