Question:medium

In Poiseuille flow, the flow rate is directly proportional to:

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The Power of the 4th Power in Hemodynamics: Because flow rate ($Q$) is directly proportional to $d^4$, even tiny adjustments to a blood vessel's diameter have a massive impact on blood flow. - For example, doubling a vessel's diameter ($2^4$) increases the volumetric flow rate by 16 times, assuming pressure remains constant! This relationship explains how the body uses vasoconstriction and vasodilation to easily regulate localized blood distribution.

Updated On: Jun 23, 2026

Length of the vessel, pressure, coefficient of viscosity
Pressure drop, length of the vessel, coefficient of viscosity
Pressure drop, diameter of the vessel
Radius of the vessel, coefficient of viscosity

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The Correct Option is C

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