Which structural layer of blood vessels is most responsible for maintaining blood pressure?

Question

Quizplus · Accepted Answer

The tunica media, composed mainly of smooth muscle fibers, is responsible for regulating the diameter of blood vessels and therefore has the largest role in maintaining blood pressure. It can adjust the diameter based on signals from the brain and hormones in the body to either constrict or dilate the vessel, thereby increasing or decreasing blood pressure.

Which Structural Layer of Blood Vessels Is Most Responsible for Maintaining