Water reabsorption is the result of
A) hydrostatic pressure
B) facilitated diffusion
C) active transport
D) osmosis
E) pinocytosis

Question

Quizplus · Accepted Answer

Water reabsorption occurs due to the process of osmosis, which is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. In the kidneys, water is reabsorbed from the filtrate in the renal tubules back into the bloodstream by osmosis, due to the high solute concentration in the interstitial fluid surrounding the tubules. This process does not require energy input, unlike active transport or pinocytosis. Facilitated diffusion, which involves the movement of substances across a membrane with the help of a transport protein, may play a role in some aspects of water reabsorption, but it is not the main mechanism. Hydrostatic pressure, which is the force exerted by a fluid due to gravity or other factors, may also impact water movement in the kidneys, but it does not directly result in water reabsorption.

Water Reabsorption Is the Result of