Which Statement Concerning the Medullary Vertical Osmotic Gradient Is INCORRECT

question 20

Multiple Choice

Which statement concerning the medullary vertical osmotic gradient is INCORRECT?

• A) The loops of Henle of juxtamedullary nephrons establish a medullary vertical osmotic gradient by means of countercurrent multiplication.
• B) The vasa recta enable the medulla to be supplied with blood while conserving the medullary vertical osmotic gradient by means of countercurrent exchange.
• C) The countercurrent system establishes and maintains a medullary vertical osmotic gradient ranging from 300 to 1,200 mosm/litre.
• D) The collecting tubules of the juxtamedullary nephrons but not the cortical nephrons descend through the medullary vertical osmotic gradient before emptying into the renal pelvis.

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