NEET PG DENTAL EXAM

Detailed explanation-1: -Contraction of smooth muscle in the tunica media results in vasoconstriction, or narrowing of the blood vessel lumen; relaxation of the smooth muscle causes vasodilation (vā′sō-dī-lā′shŭn), or widening of the blood vessel lumen.

Detailed explanation-2: -The tunica media of muscular arteries contains fewer elastic fibers and more smooth muscle cells than elastic arteries. Note the prominent internal elastic lamina, a layer of elastic tissue in the tunica intima. The external elastic lamina separates the tunica media from tunica adventitia.

Detailed explanation-3: -Tunica Media (Myocardium) The tunica media layer is called the myocardium. The myocardium is the largest of the three layers, and contains cardiac muscle fibres, and loose endomysial connective tissue that contains lots of capillaries.