Transport

Concentration Gradient If there is a concentration gradient, movement will occur After concentrations are equal= dynamic equilibrium – Dynamic equilibrium- still movement in and out of the cell but there is not net movement in one direction

Passive Transport Does not require energy Goes from high to low concentration 3 types – Facilitated diffusion – Simple diffusion – Osmosis

Simple Diffusion Small, uncharged, non-polar- easily pass through the cell membrane Move from high to low concentration

Facilitated Diffusion Large, polar, or charged- do not easily pass through the cell membrane Need transport protein Move from high to low concentration

Osmosis Hypertonic, hypotonic, isotonic – Hypertonic- high solute, low water – Hypotonic- low solute, high water – Isotonic- equal concentrations- no concentration gradient Diffusion of water

Active Transport Requires energy Moves from low to high concentration Examples: endocytosis, exocytosis

Endocytosis and Exocytosis Movement into (endocytosis) or out (exocytosis) of the cell through a vesicle 1Zc 1Zc

Exit Questions What type of transport occurred in the beaker? After equilibrium was achieved, did the molecules continue to move? Were the molecules moving in a specific direction? What is the difference between active and passive transport? Give an example of each.