When Do Atria Contract

Question

When do atria contract?
A)just prior to the beginning of diastole
B)during diastole
C)immediately after systole
D)during systole
E)just prior to the beginning of systole

Accepted Answer

The atria contract during systole, which is the phase of the cardiac cycle where the heart muscle contracts and blood is ejected from the heart into the systemic and pulmonary circulation.