Diffusion- passive movement of particles from a region of higher concentration to a region of lower concentration, as a result of the random motion of particles.
Simple diffusion- through a partially permeable membrane
Facilitated diffusion- through channel proteins
Osmosis- the passive movement of water molecules from a region of lower solute concentration to a region of higher solute concentration, across a partially permeable membrane.
Active transport- the movement of substances across a membrane using energy from ATP