 | Term | Definition |
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Diffusion |
The movement of molecules down their concentration gradient without the use of energy. It is a passive process during which molecules move from a region of higher concentration to a region of lower concentration |
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Osmosis |
The passive diffusion of water down its concentration gradient across selectively permeable membranes. It will flow from a region with a lower solute concentration (hypotonic) to a region with a higher solute concentration solute (hypertonic) |
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Facilitated Diffustion |
The diffusion of particles across a selectively permeable membrane witht the assistance of transport proteins that are specific in what they will carry and have a binding site designed for molecules of interest. This process requires no energy. |
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Active Transport |
the movement of a particle across a selectively permeable membrane against its concentration gradient. This movement requires the input o energy. |
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Endocytosis |
Process by which substances are brougght into cells by enclusure into a membrane-created vesicle that surrounds the substance and escorts it into the cell. |
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Exocytosis |
Process by which substances are exported out of the cell. A vesicle escorts the substance to the plasma membrane, fuses witht the membrance, and ejects its contents out of the cell. |
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