Blood pressure is greatest in the arteries ____.

A) when the heart is between contraction and relaxation
B) when the atria contract
C) when the Purkinje fibers are stimulated
D) when the SA node fires
E) when the ventricles contract

Blood Pressure

The pressure exerted by circulating blood upon the walls of blood vessels, often measured for health assessment.

Ventricles Contract

The phase of the cardiac cycle in which the ventricles of the heart contract, pumping blood to the body and lungs.

SA Node

The SA Node, or sinoatrial node, acts as the heart's natural pacemaker, generating electrical impulses that initiate the heartbeat.