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cell structure mmt 2

QuestionAnswer
cell membrane thin, flexible barrier that surrounds cells
cell wall stong supporting layer around the membrane
lipid bilayer double layered sheet
concentration the mass of solute in a given volume of solution, or mass/volume
diffusion when particles move from an area of high concentration to an area of low concentration
equilibrium when the concentration of the solute is the same throughtout a system, it has reached this
osmosis diffusion of water throught a selectively permeable membrane
isotonic when two solutions are the same strength
hypertonic the stronger of the two solutions
hypotonic the weaker of the two solutions
faciliated diffusion molecules that cant diffuse across the cell membrane's lipid bilayer on their own move through protein channels instead
active transport when cells move materials in the opposite direction
endocytosis process of taking material into the cell by means of infoldings, or pockets, of the cell membrane
phagocytosis extention of cytoplasm surround a particle and package it within a food vacuole
pinocytosis when small pockets along the small membrane fill with liquid and pinch off to form vacuoles within the cell
exocytosis when the membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell
cell specialization when cells throughout and organism develop in different ways to perform different tasks
tissue group of similar cells that perform a particular function
organ many groups of tissues that work together
organ system a group of organs that work together to perform a specific task
Created by: mtenebaum
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