Match the Factor Involved in the Initiation and Spread of Cardiac

question 4

Multiple Choice

Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.)
-the normal pacemaker of the heart

• A)SA node
• B)AV node
• C)bundle of His and Purkinje system
• D)gap junction

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