How does diffusion occur in cell

Answer 1

membranes?

Diffusion in cell membranes occurs when molecules move from an area of higher concentration to an area of lower concentration. This process is driven by the kinetic energy of the molecules, which causes them to move randomly until they reach an area of equilibrium. The cell membrane is composed of a phospholipid bilayer, which is a lipid-based structure that contains proteins and other molecules. These molecules are able to move through the membrane by a process called passive diffusion, which is the movement of molecules from an area of higher concentration to an area of lower concentration without the need for energy. This process is facilitated by the presence of proteins in the membrane, which act as channels or pores that allow molecules to pass through.