During exercise,
A)venous return increases.
B)both cardiac output and stroke volume increase.
C)vasodilation occurs at the active skeletal muscles.
D)venous return increases and vasodilation occurs at the active skeletal muscles.
E)All of the answers are correct.

Question

Quizplus · Accepted Answer

During exercise, several changes occur in the body to meet the increased demand for oxygen and nutrients by the active muscles. Venous return increases because exercise causes the muscles to contract, which squeezes the veins, helping to push blood back to the heart. Moreover, both cardiac output and stroke volume increase to supply the working muscles with more blood. Finally, vasodilation occurs at the active skeletal muscles, allowing more blood to flow through and increasing oxygen delivery to the muscles. Therefore, all of the answers are correct.

During Exercise