Where and why does blood flow increase during strenuous exercise
A)in the heart because of local control factors
B)in the brain because of reflex control factors
C)in the skeletal muscles because of local control factors
D)in the lungs because of local control factors

Question

Quizplus · Accepted Answer

During strenuous exercise, blood flow increases in the skeletal muscles because of local control factors such as the increased demand for oxygen and nutrients by the working muscles. The muscles release chemical signals called metabolites, which cause blood vessels to dilate and allow for increased blood flow to the area. This helps to deliver oxygen and nutrients to the muscles and remove waste products, such as carbon dioxide and lactic acid. Blood flow does increase in other organs such as the heart, lungs, and brain during exercise, but this is mainly due to reflex control factors rather than local control factors.

Where and Why Does Blood Flow Increase During Strenuous Exercise