According to the Frank-Starling law of the heart: A. At lower end diastolic volu

Question

According to the Frank-Starling law of the heart:

A. At lower end diastolic volumes, stroke volume will increase due to more overlap of actin and myosin and more forceful contractions

B. If end diastolic volume increases, stroke volume will increase proportionately due to optimal overlap of actin and myosin

C. The shorter the initial length of the cardiac muscle fibers prior to contraction the more forceful will be the subsequent contraction

D. As cardiac output is reduced, blood pools in the veins so that arterial blood pressure increases and venous return increases

A. At lower end diastolic volumes, stroke volume will increase due to more overlap of actin and myosin and more forceful contractions

B. If end diastolic volume increases, stroke volume will increase proportionately due to optimal overlap of actin and myosin

C. The shorter the initial length of the cardiac muscle fibers prior to contraction the more forceful will be the subsequent contraction

D. As cardiac output is reduced, blood pools in the veins so that arterial blood pressure increases and venous return increases

Explanation / Answer

According to the Frank-Starling law of the heart:

B. If end diastolic volume increases, stroke volume will increase proportionately due to optimal overlap of actin and myosin

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