The mechanism of water reabsorption by the renal tubules is ________.
A) filtration
B) active transport
C) osmosis
D) cotransport with sodium ions

Question

Quizplus · Accepted Answer

Water reabsorption in the renal tubules is accomplished via osmosis, a passive process whereby water moves from an area of low solute concentration (in the tubules) to an area of high solute concentration (in the interstitial fluid and peritubular capillaries). This process is facilitated by the presence of aquaporin channels in the tubule cells, which permit water to pass through the membrane.

The Mechanism of Water Reabsorption by the Renal Tubules Is