During a marathon race, a runner's blood flow q increases to 10.0 times her resting rate. her blood's viscosity η has dropped to 95.0% of its normal value, and the blood pressure difference δp across the circulatory system has increased by 50.0%. will the radii of her capillaries increase or decrease?

Increases

Explanation:

Given

Blood Flow increases to 10 times

blood viscosity decreases to 95 %

Blood Pressure difference has increased to 50 %

According hagen-poiseuille Equation

Pressure Drop is given by

where =viscosity

D=diameter of vessel

L=length of vessel

Q=Flow

For initial condition

 --------1

During Marathon

---------2

Divide 1 and 2

therefore

therefore radius of capillaries increases during Marathon

im guessing the west of station b