Which of the following occurs at the AV node during a third-degree heart block?
A) There is an abnormal delay in conducting impulses.
B) Every third impulse is allowed to enter the ventricles.
C) Impulses bypass the AV node and enter the ventricles.
D) All impulses are blocked from entering the ventricles.
Answer: D) All impulses are blocked from entering the ventricles.
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