Which Statement Is Incorrect

question 263

Multiple Choice

Which statement is incorrect?

• A)Juxtamedullary nephrons establish a vertical osmotic gradient in the medulla.
• B)NaCl pumps of the ascending limb of the loop of Henle can establish a 1,200 mOsm/liter difference between ascending and descending limbs at any given location.
• C)Countercurrent exchange allows the vasa recta to preserve the vertical osmotic gradient while supplying blood to the medullary tissue.
• D)Collecting tubules of all nephrons utilize the driving force of the vertical osmotic gradient to accomplish variable H2O reabsorption under the control of vasopressin.
• E)The filtrate is isotonic as it enters the loop of Henle, hypertonic at the tip of the loop of Henle, and hypotonic as it leaves the loop of Henle.

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