When comparing 2 blood vessels which one will have less resi

When comparing 2 blood vessels, which one will have less resistance? A or B? Which vessel is experiencing vasoconstriction? Which type of blood vessel is most important for determine peripheral resistance and why?

Solution

vascular resistance IS GIVEN BY

R= 8L / pie r^4

where

R = resistance to blood flow

L = length of the vessel

= viscosity of blood

r = radius of the blood vessel

hence    

blood vessel B- HAVE LESS RESISTANCE

blood vessel A- HAVE VASOCONSTRICTION

vasoconstriction means smaller diameter

Diameter of the blood vessel is inversely proportional to the amount of resistance.

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