The Mechanism for Producing a Concentrated Urine Involves All of the Following

Multiple Choice

The mechanism for producing a concentrated urine involves all of the following except

A) the secretion of antidiuretic hormone (ADH) by the posterior pituitary gland.
B) aquaporins being inserted into the membranes of the collecting duct cells.
C) a high concentration of NaCl in the interstitial fluid that surrounds the collecting ducts.
D) an increase in facultative water reabsorption.
E) obligatory water reabsorption in the proximal convoluted tubule.