Question

At the end of ventricular relaxation, the left ventricle contains 110 mL of blood. This is referred to as the:

A) preload.
B) afterload.
C) stroke volume.
D) cardiac output.

Answer 1

A) preload. At the end of ventricular relaxation, the left ventricle contains 110 mL of blood. This volume of blood is referred to as preload.

Step-by-step explanation:

The correct answer is A) preload.

At the end of ventricular relaxation, the left ventricle contains 110 mL of blood. This volume of blood is known as the end diastolic volume (EDV) or preload.

Preload refers to the amount of blood in the ventricles at the end of atrial systole just prior to ventricular contraction. It represents the volume of blood that fills the ventricles during diastole and determines the stretch of the myocardial fibers, which affects the force of contraction and stroke volume.