Which of the Following Statements Is Not True of the Precapillary

Multiple Choice

Which of the following statements is not true of the precapillary sphincters?

A) They decrease the osmotic pressure in the thoroughfare channel.
B) They increase or decrease rates of perfusion to the tissues served by the true capillaries.
C) They allow blood to bypass the true capillaries that are fed by the metarteriole.
D) They regulate the flow of blood to tissues served by the true capillaries.