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holt chapter 4

BPRVTHS transport

QuestionAnswer
passive transport movement across the cell membrane that does not require energy
concentration gradient difference in concentration of a substance across a space
equilibrium equal concentration of a substance on both sides of the cell membrane
diffusion movement of a substance from high to low concentration by random motion of particles (with the concentration gradient)
osmosis diffusion of water through selectively permeable membrane
hypertonic a solution that causes a cell to shrink because of osmosis (high concentration of dissolved particles outside the cell causes water to move out of the cell)
hypotonic a solution that causes a cell to swell because of osmosis (low concentration of dissolved particles outside of the cell, causes water to enter the cell)
isotonic a solution that causes no change in cell volume because of osmosis (equal concentration on both sides)
ion channel transport protein that allows ions to pass through
facilitated diffusion uses carrier proteins to transport substances from high to low concentration
active transport movement of substances against concentration gradient (from low to high concentration)
Created by: mrsnieves
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