Question

which demonstrates how blood is redistributed to the working muscles during exercise? (select precapillary sphincters of the arterioles of the non - vital organs vasodilate precapillary sphincters of the arterioles of the working muscles vasoconstrict 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 directed to working muscles. Precapillary sphincters control blood - flow. Sphincters in arterioles of non - vital organs constrict to reduce blood flow there, and sphincters in arterioles of working muscles dilate to increase 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