Question

facilitated diffusion is a protein - facilitated movement of solutes across a membrane from an area of higher concentration to an area of lower concentration. which of the terms best describes facilitated diffusion?
○ active transport
○ passive transport
○ osmosis
○ ion pump

Explanation:

Facilitated diffusion moves solutes down their concentration gradient (higher to lower) without requiring energy input, which defines passive transport. Active transport (A) requires energy and moves against gradients; osmosis (C) is water-specific passive transport; ion pumps (D) are active transport mechanisms. Thus, passive transport best describes it.

Answer:

B. passive transport