Which of the following normally carries out the fastest rate of autorhythmicity
A)AV bundle
B)AV node
C)bundle of His
D)SA node

Question

Quizplus · Accepted Answer

The SA (sinoatrial) node is normally the fastest pacemaker of the heart and thus carries out the fastest rate of autorhythmicity. The AV bundle, AV node, and bundle of His are involved in the conduction of electrical impulses through the heart but do not generate their own impulses at the same rate as the SA node.

Which of the Following Normally Carries Out the Fastest Rate