Which of the following factors is responsible for increase of cardiac output during aerobic exercise?

Question

Quizplus · Accepted Answer

During aerobic exercise, increased preload, or the amount of blood returning to the heart, helps to increase cardiac output. This is because an increased preload stretches the heart muscle, causing it to contract more forcefully and pump more blood out of the heart with each beat. Increased arterial blood pressure could occur as a result of increased cardiac output, but it is not the primary factor responsible for the increase. Decreased venous return and increased heart filling time are not likely to occur during aerobic exercise, as exercise typically increases venous return and decreases heart filling time.

Which of the Following Factors Is Responsible for Increase of Cardiac