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10 Cards in this Set
- Front
- Back
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active transport |
the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy. |
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diffusion |
the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. |
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endocytosis |
the taking in of matter by a living cell by invagination of its membrane to form a vacuole. |
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exocytosis |
a process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane. |
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facilitated diffusion |
the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane |
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osmosis |
a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane. |
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passive transport |
a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. |
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sodium-potassium pump |
which moves these two ions in opposite directions across the plasma membrane. |
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transport protein |
a protein that serves the function of moving other materials within an organism. |
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vesicle transport |
A cellular transport process in which transported substances are moved in membrane-boundedvesicles |
