The graph below shows one factor that can affect the relative thickness
(viscosity) of human blood when plasma volume is kept constant.
Blood
Relative Thickness
A
Plasma
40
0 20 40 60
Red Blood Cells (% of blood)
What effect does the percentage of red blood cells have on the viscosity of blood
A. Increasing the percentage of red blood cells causes blood viscosity to
decrease.
Increasing the percentage of red blood cells causes blood viscosity to
increase.
C. Decreasing the percentage of red blood cells causes plasma levels
to increase and blood viscosity to increase.
Decreasing the percentage of red blood cells causes plasma levels to
increase and blood viscosity to decrease.
D.