Question

multiple choice question
which term refers to narrowing of blood vessels caused by contraction of smooth muscle cells in the tunica media?
vasoconstriction
anastomosis
vasodilation
arteriosclerosis

Explanation:

To solve this, we analyze each option:

• Vasoconstriction: Defined as the narrowing of blood vessels due to smooth muscle contraction in the tunica media, matching the question's description.
• Anastomosis: Refers to the connection between blood vessels, not narrowing.
• Vasodilation: Is the widening of blood vessels, opposite of what's asked.
• Arteriosclerosis: Is the hardening and narrowing of arteries due to plaque, not directly from smooth muscle contraction as described.

Answer:

A. Vasoconstriction