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unit 4; section 3

cell transport

TermDefinition
diffusion Process by which particles tend to move from an area where they are more concentrated to an are where they are less concentrated
passive transport Doesn’t need energy to transport
facilitated diffusion Process of diffusion in which molecules pass across the membrane through cell membrane channels
aquaporins water channel protein in a cell
osmoisis Diffusion of water through a selectively permeable membrane
isotonic when the concentration of two solutions is the same
hypertonic When comparing two solutions, the solution with the greater concentration of solutes
hypotonic When comparing two solutions, the solution with the lesser concentration of solutes
osmotic pressure Pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
active transport the movement of materials against a concentration difference is known as active transport
endocytosis the process of taking material into the cell by means of in folding, or pockets, of the cell membrane.
phagocytosis is a type of endocytosis, in which extensions of cytoplasm surround a particle and package it within a food vacuole
exocytosis the membrane of a vesicle surrounds the material then fuses with the cell membrane. The contents are forced out of the cell.
Created by: BlackCo18