The following are structural components of the conducting system of the heart.

1. Purkinje fibers
2. AV bundle
3. AV node
4. SA node
5. bundle branches

The sequence in which excitation would move through this system is which of the following?

A) 1, 4, 3, 2, 5
B) 3, 2, 4, 5, 1
C) 3, 5, 4, 2, 1
D) 4, 3, 2, 5, 1
E) 4, 2, 3, 5, 1


Answer: D

Anatomy & Physiology

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