Which of the following does NOT contribute to increased stroke volume during exercise?

Question

Quizplus · Accepted Answer

During exercise, the heart rate and contractility increase, leading to increased stroke volume. Increased venous return (B) leads to increased preload, which stretches the ventricle and increases stroke volume through the Frank-Starling mechanism. Increased contractility of cardiac muscle (A) and sympathetic stimulation of ventricular muscle (D) both increase the force of contraction, leading to increased stroke volume. Increased end-diastolic volume (E) also stretches the ventricle and increases stroke volume through the Frank-Starling mechanism. However, increased length of filling time during diastole (C) does not contribute to increased stroke volume; in fact, a shorter diastolic filling time can increase stroke volume by increasing heart rate and contractility.

Which of the Following Does NOT Contribute to Increased Stroke