An increase in the permeability of collecting tubule cells to water is due to
A) a decrease in the production of ADH.
B) an increase in the production of ADH.
C) a decrease in the concentration of solutes in the blood plasma.
D) the presence of a salty urine in the bladder.

Question

Quizplus · Accepted Answer

ADH (antidiuretic hormone) is responsible for increasing the permeability of collecting tubule cells to water, which leads to reabsorption of water from urine back into the bloodstream. Therefore, an increase in the production of ADH would lead to an increase in the permeability of collecting tubule cells to water. A decrease in the production of ADH would result in a decrease in the permeability of these cells to water, leading to more water being excreted in urine. Options C and D are not correct as the concentration of solutes or presence of a salty urine in the bladder do not directly affect the permeability of collecting tubule cells to water.

An Increase in the Permeability of Collecting Tubule Cells to Water