A cardiovascular nurse is orienting a new nurse to the unit. The new nurse questions the steps of the normal cardiac conduction system. The senior nurse explains that action potentials in the myocardium follow which sequence?
1. Sinoatrial (SA) node, internodal pathway, atrioventricular (AV) node, bundle of His, and Purkinje fibers
2. Internodal pathway, sinoatrial (SA) node, atrioventricular (AV) node, and Purkinje fibers
3. Atrioventricular (AV) node, sinoatrial (SA) node, bundle of His, and internodal pathway
4. Purkinje fibers, bundle of His, atrioventricular (AV) node, internodal pathway, and sinoatrial (SA) node
Question 2
The nurse knows that the SA node generates a new action potential approximately __ times per minute under resting conditions.
Standard Text: Round answer to the nearest whole number.
What will be an ideal response?