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cell transport

cell transport functions

TermDefinition
Plasma Membrane the flexible boundary between the cell and its environment ,to allow a steady supply of nutrients to come into the cell no matter what the external conditions are.
Diffusion Random movement of particles from an area of higher concentration to an area of lower concentration ,eventually resulting in even distribution .
Osmosis The diffusion of water across a selectively permeable membrane.
Isotonic Solution Concentration of dissolved substances in the solution is the same as the concentration or dissolved substances inside the cell.
Hypotonic Solution The concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell.
Hypertonic Solution The concentration of dissolved substances outside the cell is higher than the concentration inside the cell.
Passive Transport Movement of particles across cell membranes by diffusion or osmosis ;the cell uses no energy to move particles across the membrane.
Facilitated Diffusion Passive transport of materials across the membrane using transport proteins.
Active Transport Movement of materials through a membrane against a concentration gradient .
Endocytosis A process by which a cell surrounds and takes in material from its environment .
Exocytosis The explosion or secretion of material from a cell.
Created by: Karla Perez
 

 



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