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Unit 3: Cells B

Cell Membrane & Cell Transport

active transport energy-requiring process that moves material across a cell membrane against a concentration difference
concentration the mass of solute in a given volume of solution, or mass/volume
diffusion the movement of solute across a membrane from high to low concentration
endocytosis process by which a cell takes material into the cell by infolding of the cell membrane
equilibrium when the concentration of a solute is the same throughout a solution
exocytosis process by which a cell releases large amounts of material
facilitated diffusion movement of specific molecules across cell membranes through protein channels
homeostasis process by which organisms maintain a relatively stable internal environment
hypertonic when comparing two solutions, the solution with the higher concentration of solutes
isotonic when the concentration of two solutions is the same
lipid bilayer double-layered sheet that forms the core of nearly all cell membranes
osmosis diffusion of water through a selectively permeable membrane
phagocytosis process in which extensions of cytoplasm surround and engulf large particles and take them into the cell
pinocytosis process by which a cell takes in liquid from the surrounding environment
Created by: sherrysliwa
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