CELL TRANSPORT CONT pp. 97-102

Movement across the cell membrane without energy Passive transport: Movement across the cell membrane without energy

Osmosis: special diffusion of water (polar) across membrane A solution is made of a solute dissolved in a solvent (like water). Direction of movement is dependent on solutes outside cell. Water moves towards the greatest number of solutes or towards the highest concentration

Hypertonic: CONC of solutes is higher outside the cell and water moves out the cell- cell shrinks

Hypotonic: CONC of solutes is lower outside the cell and water moves into the cell cell swells

Isotonic: CONC of solutes inside = outside; so no net water movement

Facilitated Diffusion: molecules too big to move across the membrane use carrier proteins EX. Glucose