In the PCT,ions and organic substrates are actively removed,thus causing what to occur?
A)An osmotic flow of water out of the tubular fluid.
B)An increase in aquaporin channels in the membrane.
C)An osmotic flow of water into the tubular fluid.
D)An increase in sodium transporters in the membrane.
E)A decrease in sodium transporters in the membrane.

Question

Quizplus · Accepted Answer

The active removal of ions and organic substrates in the proximal convoluted tubule (PCT) of the kidney leads to an osmotic gradient that causes water to follow these solutes out of the tubular fluid, thus concentrating the urine. This process is driven by osmosis, where water moves from areas of lower solute concentration to areas of higher solute concentration.

In the PCT,ions and Organic Substrates Are Actively Removed,thus Causing