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10 Cards in this Set
- Front
- Back
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active transport |
the movement of ions or molecules across the cell membrane using energy |
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diffusion |
is 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 |
A process of cellular ingestion by which the plasma membrane folds inward to bring substances into the cell. Which it enters |
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exocytosis |
process by which a cell transports secretory products through the cytoplasm to the plasma membrane. Secretory products are packaged into transport vesicles (membrane-bound. exit |
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facilitated diffusion |
transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins. |
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osmosis |
Osmosis is the movement of water molecules through a selectively permeable membrane from higher water concentration to a lower water concentration - or - down a concentration gradient. |
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passive transport |
Passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. doesn't need energy |
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sodium-potassium pump |
Active transport is responsible for the fact that cells contain a relatively high concentrations ofpotassium ions but low concentrations ofsodium ions. The mechanism responsible for this is the sodium-potassium pump, which moves these two ions in opposite directions across the plasma membrane. |
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transport protein |
cellular biology, membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes, which are lipid bilayers that contain proteins embedded in them. |
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vesicle transport |
Some molecules, such as proteins, are too large to pass through the plasma membrane, regardless of their concentration inside and outside the cell. Very large molecules cross the plasma membrane with a different sort of help, called vesicle |
