Question

did you get it? the movement of a substance down its concentration gradient (from high to low concentration) through a channel protein is called... a. active transport b. osmosis c. facilitated diffusion d. selective permeability

Explanation:

Active transport moves substances against the concentration gradient with energy. Osmosis is the diffusion of water across a semi - permeable membrane. Selective permeability is a property of membranes. Facilitated diffusion is the movement of a substance down its concentration gradient through a channel protein.

Answer:

C. Facilitated Diffusion