Which of the following does not control the cardiac cycle?
A) Aortic valve
B) Sinoatrial node
C) Atrioventricular node
D) Bundle of His
E) Purkinje fibers

Question

Quizplus · Accepted Answer

The aortic valve is not involved in controlling the cardiac cycle. It's an important valve that prevents the backflow of blood from the aorta into the left ventricle during diastole. However, the cardiac cycle is primarily regulated by the electrical conduction system of the heart, which includes the sinoatrial node, atrioventricular node, Bundle of His, and Purkinje fibers.

Which of the Following Does Not Control the Cardiac Cycle