During atrial diastole, a. the atrial pressure exceeds the ventricular pressure. b. blood from the pulmonary and systemic circuits fills atria. c. the semilunar valves are forced open. d. the SA node...

During atrial diastole,

a. the atrial pressure exceeds the ventricular pressure.

b. blood from the pulmonary and systemic circuits fills atria.

c. the semilunar valves are forced open.

d. the SA node depolarizes.

Atrial repolarization coincides in time with the

a. P wave.

b. T wave.

c. QRS wave.

d. P-Q interval.