40. Circulatory System
Heart Physiology
Multiple Choice
Multiple ChoiceA recording of the electrical activity of a patient's heart shows that the atria are contracting regularly and normally, but every few beats the ventricles fail to contract. Which of the following is probably functioning improperly?
A
Aortic semilunar valve
B
Coronary artery
C
SA node
D
AV valve
E
AV node
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