The extent of ventricular filling is the preload of the heart, whereas the magnitude of the arterial blood pressure is the afterload of the heart.

Question

Quizplus · Accepted Answer

This statement is true. Preload refers to the degree of stretch of the ventricles during diastole, which affects the volume of blood that they can pump out during systole. Afterload refers to the resistance that the heart has to work against in order to eject blood into the arteries, which is determined by the magnitude of the arterial blood pressure.

The Extent of Ventricular Filling Is the Preload of the Heart