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NREMT Advanced EMT Practice Test #4

Category - EMT-I/99

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Arteries have three layers. Which is the middle layer?

Tunica Adventitia
Tunica Media
Tunica Intima
Tunica Semi

Explanation

Answer - B - The tunica media is the middle of the three artery layers. The tunica media allows the vessel to regulate blood flow by increasing or decreasing its lumen through muscle constriction and dilation. The tunica intima is the inner most layer and the tunica adventitia is the outer covering.

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