In-Text Figure Based Questions
-What happens to the electrical impulse when it reaches the AV node? (Figure 20-11)
A) It fizzles out.
B) It gets delayed.
C) It gets stronger.
D) It spreads across the purkinje fibers.
E) It causes ventricular contraction to occur.

Question

Quizplus · Accepted Answer

When the electrical impulse reaches the AV node, it gets delayed before spreading to the ventricles. This delay is necessary to ensure that the atria contract before the ventricles, allowing for efficient blood flow.