Question

What is the function of protein

channels in facilitated
diffusion?
A. help large molecules cross the cell
membrane
B. block all molecules from entering the cell
membranes
C. help molecules expand to larger
molecules

Answer 1

A transport protein completely spans the membrane, and allows certain molecules or ions to diffuse across the membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion.