During exercise
A) vasodilation occurs at the active skeletal muscles.
B) venous return increases.
C) both cardiac output and stroke volume increase.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

During exercise, vasodilation occurs at the active skeletal muscles, allowing for increased blood flow and oxygen delivery to the working muscles. Venous return also increases as skeletal muscle contractions help push blood back towards the heart. This increase in venous return, along with an increase in heart rate and stroke volume, leads to an increase in cardiac output. Therefore, all three options (A, B, and C) are correct, making D the best choice.

During Exercise