when the radius of the artery is reduced, the blood pressure
A. increased
B. decreased
C. remains same
D. zero
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Answer:
decreased
A decreased diameter means more of the blood contacts the vessel wall, and resistance increases, subsequently decreasing flow. ... And if an artery or arteriole dilates to twice its initial radius, then resistance in the vessel will decrease to 1/16 of its original value and flow will increase 16 times
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