Chapter 14, Problem 67RPP

To determine

The factor by which the resistance of all the arterioles changes, if their radius is decreased to 80% the original value, given that the arteriole provides $0.62\frac{\text{mm Hg}}{{\text{cm}}^{\text{3}}\text{/s}}$ resistance to the fluid flow in a human circulatory system, from the given options. The heart pumps about $80{\text{ cm}}^3\text{/s}$ of blood into the aorta, the total pressure drop across the circulatory system is $100\text{ mm Hg}$ and the approximate pressure drop across each aorta, artery, capillary, venule, vein and vena cava is given in the figure.

(a) $1.3$

(b) $1.6$

(c) $2.4$

(d) $0.4$

(e) $0.6$