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Chapter 5 Section 1

ch 5 sec 1

TermDefinition
passive transport substances crossing the cell membrane without any input of energy by the cell
diffusion movement of molecules from an area of higher concentration to an area of lower concentration
concentration gradient the difference in the concentration of molecules across a distance
equilibrium the concentration of molecules is the same throughout the space the molecules occupy
osmosis the process where WATER molecules diffuse from an area of higher concentration to an area of lower concentration
hypotonic describes a solution whose solute concentration is lower than the solute concentration inside the cell
hypertonic describes a solute whose solute concentration is higher than the solute concentration inside the cell
isotonic describes a solution whose solute concentration is equal to the solute concentration inside the cell
contractile vacuole organelles that remove water
turgor pressure the pressure that water molecules exert against the cell wall
plasmolysis the process in which the cells shrink away from the cell walls, ad turgor pressure is lost
cytolysis the bursting of cells
facilitated diffusion the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins
carrier protein proteins that assist in the movement of molecules across the cell membrane
ion channel a complex of protein molecules in a cell membrane that form a pore through which ions can pass
Created by: zhaberstich