The mechanism for producing concentrated urine involves
A) the secretion of antidiuretic hormone (ADH).
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) a properly functioning nephron loop (loop of Henle).
E) all of the above

Question

Quizplus · Accepted Answer

All of these processes are involved in the mechanism for producing concentrated urine. ADH stimulates the insertion of aquaporins into the collecting duct cells, which allows for more water to be reabsorbed. The high concentration of NaCl in the interstitial fluid is established by the nephron loop, which creates a concentration gradient for water to follow. Therefore, a properly functioning nephron loop is necessary for the production of concentrated urine.

The Mechanism for Producing Concentrated Urine Involves