Which statement is NOT true of the structure of arteries and veins?
A)The outer layer is fibrous connective tissue that prevents rupture of arteries.
B)The smooth muscle layer helps regulate blood pressure.
C)The epithelial lining is smooth to prevent abnormal clotting.
D)Valves in veins are made of smooth muscle to help keep the blood moving.

Question

Quizplus · Accepted Answer

Valves in veins are made of folds in the endothelial lining, not smooth muscle, which help to prevent backflow of blood and keep the blood moving in one direction.

Which Statement Is NOT True of the Structure of Arteries