Sympathetic Nerve Fibers That Innervate Blood Vessel Walls are Found

Question

Sympathetic nerve fibers that innervate blood vessel walls are found primarily in the ________.
A) tunica intima
B) tunica media
C) tunica adventitia
D) tunica externa
E) tunica interna

Accepted Answer

Sympathetic nerve fibers primarily innervate the tunica media of blood vessel walls, which contains the smooth muscle cells responsible for vasoconstriction and vasodilation.