Stroke volume depends on a series of factors: one is the force the myocardial muscle exerts to move the blood.This is known as:
A) preload.
B) contractility.
C) automaticity.
D) afterload.

Question

Quizplus · Accepted Answer

Contractility refers to the force the myocardial muscle exerts to move the blood, and is one of the factors that determines stroke volume. Preload refers to the degree of stretch in the ventricles before contraction, automaticity refers to the ability of the heart to generate electrical impulses on its own, and afterload refers to the resistance the heart must overcome to eject blood from the ventricles.

Stroke Volume Depends on a Series of Factors: One Is