Which of the following depolarizes next after the AV node? a. Atrial myocardium b. Ventricular myocardium c. Bundle branches d. AV bundle During atrial systole, a. the atrial pressure exceeds...

Which of the following depolarizes next after the AV node?

a. Atrial myocardium

b. Ventricular myocardium

c. Bundle branches

d. AV bundle

During atrial systole,

a. the atrial pressure exceeds ventricular pressure.

b. 70 percent of ventricular filling occurs.

c. the AV valves are open.

d. valves prevent backflow into the great veins.