Which of the following statements is false regarding atrial systole?

Question

Quizplus · Accepted Answer

During atrial systole, the SA node fires, causing the atria to depolarize and contract together creating decreased volume and higher pressure in the atria than the ventricles. The increased pressure pushes blood through the AV valves (tricuspid and bicuspid) into the ventricles. It is important to note that the pressure of the blood due to the atria contracting is what forces the AV valves to open. During atrial diastole, the atria then repolarize and relax. The elastic fibers in the walls of the atria return the atria to shape, increasing the volume and decreasing the pressure in the atria. The blood pressure in the superior and inferior vena cavae (on the right side of the heart) and the pulmonary veins (on the left side of the heart) is then greater than the pressure inside the atria, so blood rushes in from these vessels to fill the right and left atria.

Which of the Following Statements Is False Regarding Atrial Systole