The diffusion of water molecules through a selectively permeable membrane from a region where water molecules are more concentrated to a region where they are less concentrated is called _______.
A) osmosis
B) diffusion
C) filtration
D) active transport

Question

Quizplus · Accepted Answer

The process described in the question is osmosis. Osmosis specifically refers to the movement of water molecules across a selectively permeable membrane in response to concentration gradients. Diffusion (B) refers to the movement of any type of molecule, not just water, from higher to lower concentration. Filtration (C) involves the movement of molecules or particles through a membrane or other barrier under the influence of pressure. Active transport (D) refers to the movement of molecules or ions against their concentration gradient, requiring the input of energy (usually in the form of ATP). None of the other options describe the specific process described in the question.

The Diffusion of Water Molecules Through a Selectively Permeable Membrane