KVPY SB SX Exam 2011 Question Paper

Question : 114 of 120

Marks: +1, -0

Although blood flows through large arteries at high pressure, when the blood reaches small capillaries the pressure decreases because

the valves in the arteries regulate the rate of blood flow into the capillaries
the volume of blood in the capillaries is much lesser than that in the arteries
the total cross-sectional area of capillaries arising from an artery is much greater than that of the artery
elastin fibers in the capillaries help to reduce the arterial pressure

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