(ii) What will happen if diameter of artery is reduced?
a) Blood pressure will fall
b) Blood pressure will increase
c) Blood pressure will remain same
d) Blood will clot.
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A decreased diameter means more of the blood contacts the vessel wall, and resistance increases, subsequently decreasing flow. The influence of lumen diameter on resistance is dramatic: A slight increase or decrease in diameter causes a huge decrease or increase in resistance.
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What will happen if diameter of artery is reduced?
answer :a) Blood pressure will fall
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