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| first function of removing the cell from the environment |
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| carbohydrate chains on the outside of the cell |
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| some things can cross the plasma membrane while others cannot |
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| membrane transport that doesnt require any energy |
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| needs energy for molecules to move up the transport |
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| used to transport large molecules in or out of a cell |
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Definition
| process of releasing molecules from a cell by bulk transport. |
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Definition
process of bringing molecules or other
materials into a cell by bulk transport. |
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| used to refer to endocytosis of solid particles like debris or bacteria. |
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| endocytosis of droplets of fluid and dissolved molecules |
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Definition
| The ability to transport molecules in and out of a cell |
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Definition
| bind to a molecule on one side of the membrane and the binding causes the carrier protein to change shape to release the molecule on the other side of the membrane. |
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Definition
| small non polar molecules move in and out of the cell from areas of higher concentration to lower concentration |
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| the diffusion of molecules through a transport protein. |
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| a tunnel that allows ions to flow across the membrane. |
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| Gated ion channels are not open all the time; they open or close in response to a signal. |
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| water moves in the direction of the highest concentration of solute because water is attracted to solute molecules. |
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| The transport proteins that allow water to cross the membrane |
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| there is more solute outside the cell than inside the cell. |
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Definition
| there is less solute outside the cell than inside the cell. |
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Definition
| there is the same concentration of solute outside the cell as inside the cell. |
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| the energy in ATP is used to move ions across the membrane. |
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Term
| secondary active transport |
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Definition
| uses the energy in a concentration gradient to move molecules up their concentration gradient. |
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Definition
| the charge of the cell, or more precisely, the difference between the charge inside the cell and the charge outside the cell. |
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| cells that change their membrane potential by opening gated ion channels that let ions move in or out of the cell. |
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| long hollow tubes made of a protein called tubulin. |
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| special proteins called motor proteins are able to bind to vesicles and “walk” along the microtubules to move them form one place to another. |
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| long tail-like structures |
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| short hair-like projections |
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| structures that hold cells together. |
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| mportant for fast communication between cells. |
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| The space between the cells in a multicellular organism that give cells a place to attach in tissues where the cells don’t physically tough each other and it contains nutrients, wastes, and signaling molecules moving between cells. |
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