Term
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Definition
| the movement of materials across a membrane using cell energy. Materials move from low to high concentration. |
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Term
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Definition
| ion channel or carrier proteins move substances up the concentration gradient. |
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Definition
| a carrier protein that actively transports K + ions into and Na+ ions out of cell |
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Definition
| movement of fluid, macromolecules and large particles, including other cells into the cell. |
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Term
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Definition
| “cell drinking” brings in solutes or fluids |
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Term
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Definition
| “cell eating” brings in large particles or whole cells |
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Definition
| “eating cells” that digest bacteria, viruses which could harm the body |
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Term
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Definition
| the process of releasing a substance outside the membrane in a vesicle |
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Definition
| the movement of molecules from an area of higher concentration to an area of lower concentration. |
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Term
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Definition
| the difference in the concentration of molecules across a distance. |
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Term
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Definition
| when the concentration of molecules is the same throughout the space the molecules occupy |
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Definition
| the movement of particles from an area of higher concentration on one side of the membrane to an area of lower concentration allowing only certain molecules to pass through the membrane. |
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Term
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Definition
| the process by which molecules diffuse across a cell membrane from a higher concentration to an area of lower concentration. Also, a passive transport of water. |
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Term
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Definition
| a solution whose solute concentration is lower than the solute concentration inside a cell.Water diffuses into the cell. |
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Term
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Definition
| a solution whose solute concentration is higher than the solute concentration inside a cell. Water diffuses out of the cell. |
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Term
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Definition
| when the concentrations of solutes outside and inside the cell are equal. Water diffuses into and out of the cell at equal rates. |
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Term
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Definition
| organelles that remove water. They collect the excess water and then contract, pumping the water out of the cell. |
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Term
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Definition
| the pressure that water molecules exert against the cell wall. |
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Term
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Definition
| the shrinking of the cell membrane from the cell wall in response to the loss of water by osmosis. |
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Definition
| the bursting of cells caused by water diffusing into the cell making it swell. |
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Term
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Definition
| a type of passive transport that assists the movement of molecules from a high to a low concentration using carrier proteins. |
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Term
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Definition
| an organic compound that can change its shape to move non-polar or large molecules across the membrane. |
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Term
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Definition
| a type of protein specific for charged molecules that form a small passageway through which ions can pass.Transports Na+,Cl,Ca2+ and K+. |
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Term
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Definition
| a small cavity or sac that forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell. |
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Term
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Definition
| open or close due to stretching of the membrane, chemicals in the cytosol, external environment or electrical signals. Allows or prevents the passage of ions |
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Term
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Definition
| the interior of the lipid bilayer |
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