using three examples from 2 body system explain the physiological concept of flow down gradients, e.g...

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Medical Sciences

using three examples from 2 body system explain thephysiological concept of flow down gradients, e.g pressuregradients, electro-chemical gradients etc. can talk about airwayresistance, blood vessel resistance in those gradient where ever itsuits, example of system can be renal system talk about loop henleflow down gradient.. In your answer include the terms gradient andresistance. provide detailed answers in each examplephysiologically

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1 Circulatory system Gradients Pressure gradient Liquids flow down their concentration gradients from areas of high pressure to areas of lower pressure In practice this means blood will flow from the arterial end of a vessel to the venous end This pressure gradient is primarily created by the pumping action of the heart Relating to the above equation the value for pressure is normally calculated as the mean difference between the start and the end of the vessel Resistance depends on radius viscosity vessel length Radius As a vessels cross sectional area decreases the average velocity of blood increases Therefore we could consider that a capillary should have a high velocity because of its very small cross section In fact because capillary beds are connected See Answer

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