Cardiac output is increased by
A)more sympathetic stimulation.
B)increased end-diastolic volume.
C)increased stroke volume.
D)All of the answers are correct.
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

All of the choices listed contribute to an increase in cardiac output. Sympathetic stimulation increases heart rate and contractility, increasing both stroke volume and cardiac output. Increased end-diastolic volume stretches cardiac muscle fibers, leading to a more forceful contraction (the Frank-Starling mechanism), which increases stroke volume and cardiac output. Increased stroke volume directly increases cardiac output.

Cardiac Output Is Increased by