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Cell Membranes

cell membranes and crossing the membrane

TermDefinition
phospholipid forms bilayer of cell membrane with nonpolar tails sandwiched in the middle
transport protein membrane protein that lets polar, charged or large materials in or out of the cell
receptor protein membrane protein that binds to a signal molecule
diffusion movement from areas of higher to areas of lower until equilibrium
equilibrium even distribution or balance so no net change occurs
solute material dissolved in a solvent
solvent liquid that dissolves solutes
facilitated diffusion movement across a cell membrane down the gradient through a transport protein
passive transport any movement across a cell membrane down the gradient without additional energy
active transport movement against the gradient from lower areas to higher areas using energy
protein pump transport protein that forces materials across the membrane against their gradient
exocytosis when vesicle fuses with cell membrane to transport larger stuff OUT
endocytosis when vesicle forms from cell membrane to transport larger stuff IN
permeable allowed to pass across a membrane
selectively permeable lets some stuff across a membrane but blocks other stuff
osmosis facilitated diffusion of water down its gradient across a membrane
Created by: strawend
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