Osmosis

 

Osmosis = diffusion of water across a selectively permeable membrane

Occurs when water can cross membrane, but solute cannot

 

Terminology:

Solvent = most common material in a solution (= water)

Solute = less common. Is dissolved in solvent

Isotonic solution equal amounts of solute on either side

Hypotonic solution less solute than the other side

Hypertonic solution more solute than the other side