An increase in venous return will ______ stroke volume and ___________ the strength of contraction.
A)increase;increase
B)increase;decrease
C)decrease;decrease
D)decrease;increase

Question

Quizplus · Accepted Answer

An increase in venous return results in an increase in filling pressures in the heart, leading to increased ventricular end-diastolic volume (EDV) which is a determinant of stroke volume. Thus, an increase in venous return increases stroke volume. Additionally, the increased EDV stretches the myocardial fibers leading to an increase in the strength of contraction (also known as the Frank-Starling mechanism), further increasing stroke volume.

An Increase in Venous Return Will ______ Stroke Volume and ___________

An Increase in Venous Return Will Stroke Volume and _____