| A | B |
|---|
| marker, receptor, channel | proteins that protrude through the cell membrane |
| marker proteins | found on the surface and identify cells |
| phospholipids and proteins | components that make up the cell membrane |
| receptor proteins | one way of reacting to molecules is transmitting info into cell |
| phospholipids | their shape and polarity form a lipid bilayer |
| channel proteins | where most waste and food move in and out |
| cell membrane | allows material to enter and leave the cell |
| diffusion | a type of passive transport (does not expend energy) |
| water | passively diffuses through the lipid bilayer |
| sodium | pumped out of a nerve cell |
| potassium | pumped into a nerve cell |
| osmosis | the process of water passively moving through a cell membrane |
| open cologne bottle | illustrates diffusion |
| the ultimate goal of diffusion and osmosis | equilibrium |
| exocytosis | expels molecules that are too large for other types of transport |
| exmples of passive transport | diffusion, osmosis, facilitated diffusuib |
| examples of active transport | endocytosis, exocytosis, sodium potasssium pump |
| active transport | require energy expenditure |
| passive transport | does not require energy expenditure |
