Vasoconstriction leads to........

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Question

(C) Vasoconstriction is the narrowing of blood vessels resulting from contraction of the muscular wall of the vessels,particularly the large arteries

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Increase in blood pressure

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(C) Vasoconstriction is the narrowing of blood vessels resulting from contraction of the muscular wall of the vessels,particularly the large arteries and small arterioles.When the diameter of the blood vessels decreases,the resistance to blood flow increases.According to the principles of hemodynamics,an increase in peripheral resistance leads to an increase in blood pressure.Therefore,vasoconstriction causes an increase in blood pressure.

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Assertion : When there is a fall in the blood pressure due to loss of blood volume,this is compensated by vasoconstriction of veins.
Reason : Veins hold the extra amount of blood which can be shifted to the arteries as required.

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