Special case of diffusion which is the net movement of water molecules from region where they are highly concentrated ( dilute solution and lots of water molecules ) to a region where less concentration ( concentrated solution - less water molecules ) across a partially permeable membrane
Water movement occurs from a dilute solution (lots of water) to a concentrated solution (less water) by osmosis
Water movement occurs from a high (less negative ) water potential To a low ( more negative ) water potential
Water moent faster if there’s a larger difference between water potentials - a steeper gradient means greater tendency for water to move
Water movement faster if there’s a thin exchange surface and larger surface area
