PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ____ is composed of circularly arranged layers of smooth muscle cells
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tunica interna
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tunica media
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tunica externa
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none of the above
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Explanation:
Detailed explanation-1: -In the aorta, the tunica media constitutes the greater part of the vessel wall. It is made up of multiple elastic lamellae alternating with thin layers of circularly oriented smooth muscle .
Detailed explanation-2: -Muscular arteries contain more smooth muscle cells in the tunica media layer than the elastic arteries.
Detailed explanation-3: -The middle layer, the tunica media, is primarily smooth muscle and is usually the thickest layer. It not only provides support for the vessel but also changes vessel diameter to regulate blood flow and blood pressure.
There is 1 question to complete.