The flow, F, of a fluid through a rigid tube is directly proportional to the pre

Question

The flow, F, of a fluid through a rigid tube is directly proportional to the pressure difference and the fourth power of the radius, andd inversely proportional to the tube length and the fluid viscosity: flow pressure gradient tube radius 4 8Ln tube length fluid viscosity During acute homeostatic maintenance of blood flow to tissues (e.g. during exercise or hemorrhage), which of the following variables in the Hagen-Poiseuille equation are unlikely to be regulated by the autonomic nervous system? (Note: More than one answer may be correct.) Flow Pressure gradient Tube radius Tube length Fluid viscosity

Explanation / Answer

The variables can be regulated by ANS are -

FLOW - During exercise or hemorrhage the flow can be controlled be ANS as its a body phenomenon of protecting.

Tube Radius - Its can be regulate by ANS though releasing certain vasso - constrictor or dilators at time of exercise & hemorrhage.

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