5
QuizMultiple Choice

Cardiovascular System Career Specialties — Unit test

Question 5 • Anatomy & Physiology B

The “pacemaker” of the heart starts an electrical impulse in the right atrium to cause the atria to contract. What is the “pacemaker” of the heart?

Answer
A
the SA node
B
the AV node
C
the bundle of His
D
the Purkinje fibers
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