Multiple choice

Tunica media of an elastic artery is made of mainly

  1. smooth muscle fibres

  2. loose alveolar tissue

  3. elastic fibres

  4. collagen fibres
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Elastic arteries like the aorta need to stretch and recoil with each heartbeat to maintain continuous blood flow. Their tunica media (middle layer) is rich in elastic fibers, primarily elastin, which provide this essential elasticity. Smooth muscle fibers are present but are more prominent in muscular arteries that regulate blood flow through vasoconstriction. Collagen provides strength but not stretch. Loose alveolar tissue is not a major component of arterial walls.

Keep practicing — related questions