Blood flow occurs in the cardiovascular system, which includes tne nearu au ts u
ID: 1778922 • Letter: B
Question
Blood flow occurs in the cardiovascular system, which includes tne nearu au ts uoou vessel. Blood containing oxygen from lungs goes to aorta. From the aorta, it goes to the arteries, branches out into the many small capillaries in the vascular bed. Since blood if flowing from large veins to small capillaries in a connecting system, it has a flow rate that can be explained by the law of continuity: Flow Rate Ai x Vi AxV2, where A reters to the cross-sectional area of one region in a connecting system and V is the average velocity of the fluid in that area. ction in One interesting property of blood flow is its viscosity, which is defined as the fri fluids. Viscosity can be calculated using Poiseuille's Principle: Rate of Flow = (P1-P2)( In this equation r-the radius of the tube (radius of capillary), L = length of the capillary, = coefficient of viscosity, P1-P2-difference in pressure ofdifferent ends of capillary A student using a machine that measures the frictional force in a sample of fluid 1. finds the frictional force in blood is higher than in water but lower than in castor oil. Which one of the following statement is true: I. Flow rate is higher in castor oil than in blood, and higher in blood than in water. II. Flow rate is the same for all three materials IIL Flow rate is higher in water than in blood, and higher in blood than in castor oil. A. I only B. I and II C. only D. none of the above statements are trueExplanation / Answer
Option (C) is correct.
Frictional force is depending on the coefficient of viscosity.
According to statement castor oil has highest frictional force after that blood then water.
Flow rate is inversely proportional to coefficient of viscosity.
Hence ,less coefficient of viscosity have higher flow rate.
Hence, flow rate is higher in water than in blood and higher in blood than in castor oil.