Question

which demonstrates how blood is redistributed to the working muscles during exercise? (select precapillary sphincters of the arterioles of the working muscles vasoconstrict precapillary sphincters of the arterioles of the non - vital organs vasodilate precapillary sphincters of the arterioles of the non - vital organs vasoconstrict precapillary sphincters of the arterioles of the working muscles vasodilate)

Explanation:

During exercise, blood needs to be redirected to working muscles. Precapillary sphincters control blood - flow. Vasoconstriction of arterioles in non - vital organs reduces blood flow to them, and vasodilation of arterioles in working muscles increases blood flow to them.

Answer:

precapillary sphincters of the arterioles of the non - vital organs vasoconstrict, precapillary sphincters of the arterioles of the working muscles vasodilate