the movement of materials through a cell membrane using energy
the difference in the concentration of molecules across a distance
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
result of diffusion where there is continuous movement of particles but no overall change in concentration
process by which a cell takes in a substance by surrounding it with the cell membrane
process by which vesicles release their contents outside the cell
pathway provided by transport proteins that helps certain molecules pass through a membrane
when comparing two solutions, the solution with the greater concentration of solutes
when comparing two solutions, the solution with the lesser concentration of solutes
preventing especially liquids to pass or diffuse through
of or involving muscular contraction in which tension is constant while length changes
double layered sheet that forms the core of nearly all cell membranes
diffusion of water through a selectively permeable membrane
the movement of substances across a cell membrane without the use of energy by the cell
allowing (especially liquids) to pass or diffuse through
process in which extensions of cytoplasm surround and engulf large particles and take them into the cell
process by which certain cells can engulf and incorporate droplets of fluid
selectively permeable membrane
membrane that allows some substances to pass more easily than others and blocks the passage of some substances altogether
substance that is dissolved in a solvent to make a solution
mixture of two or more substances in which the molecules of the substances are evenly distributed
a liquid substance capable of dissolving other substances
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