The tunica media is the middle layer of the artery and is formed from what?

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Multiple Choice

The tunica media is the middle layer of the artery and is formed from what?

Explanation:
The middle layer of an artery is made mainly of smooth muscle cells arranged in a circular pattern, with elastic fibers embedded. This muscle can contract or relax to constrict or dilate the vessel, changing its diameter to regulate blood flow and pressure. The inner lining is endothelium (the tunica intima), not the middle layer, and the outer layer is connective tissue (the tunica externa) that provides support and cushioning. So the best description is smooth muscle that actively changes the vessel radius.

The middle layer of an artery is made mainly of smooth muscle cells arranged in a circular pattern, with elastic fibers embedded. This muscle can contract or relax to constrict or dilate the vessel, changing its diameter to regulate blood flow and pressure. The inner lining is endothelium (the tunica intima), not the middle layer, and the outer layer is connective tissue (the tunica externa) that provides support and cushioning. So the best description is smooth muscle that actively changes the vessel radius.

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