If the diameter of a blood vessel is reduced by two-thirds and the blood pressure remains constant (that is, the blood pressure is unchanging as the diameter is reduced), then the blood flow rate through the vessel will ... A. be reduced by 80/81. B. be reduced by 8/9 since the area of a circle is πr2. C. be reduced by 1/9 since the area of a circle is πr2. D. be reduced by 2/3. E. be unchanged since the blood pressure does not change.

If the diameter of a blood vessel is reduced by two-thirds and the blood pressure remains constant (that is, the blood pressure is unchanging as the diameter is reduced), then the blood flow rate through the vessel will ... A. be reduced by 80/81. B. be reduced by 8/9 since the area of a circle is πr2. C. be reduced by 1/9 since the area of a circle is πr2. D. be reduced by 2/3. E. be unchanged since the blood pressure does not change.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter10: The Blood Vessels And Blood Pressure

Section10.1: Patterns And Physics Of Blood Flow

Problem 2CYU

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	A.	be reduced by 80/81.
	B.	be reduced by 8/9 since the area of a circle is πr².
	C.	be reduced by 1/9 since the area of a circle is πr².
	D.	be reduced by 2/3.
	E.	be unchanged since the blood pressure does not change.