Term
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Definition
| allows substances to cross it mroe easily than others |
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Term
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Definition
1. glycerol
2. 2 fatty acids
3. phosphate group |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| integral proteins that span the membrane |
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Term
| Membrane Protein Functions |
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Definition
1.transport
2.enzymatic activity
3.signal transduction
4.cell-cell recognition
5.intercellular joining
6.Attachment to the cytoskeleton and extracellular matrix. |
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Term
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Definition
| can dissolve in the lipid bilayer and pass through the membrane repidly |
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Term
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Definition
| do not cross the membrane easily. |
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Term
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Definition
| allow passage of hydrophilic substances across the membrane |
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Term
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Definition
| aquaporins, facilitate the passage of water. |
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Term
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Definition
| the tendency for molecules to spread out evenly into the available space. |
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Term
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Definition
| the region along which the density of a chemical substance increases or decreases. |
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Term
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Definition
| diffusion of a substance across a biological membrane, no energy is expended by the cell to make it happen. |
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Term
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Definition
| the diffusion of water across a selectively permeable membrane |
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Term
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Definition
| ability of a surround solution to cause a cell to gain or lose water |
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Term
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Definition
| solute concentration is the same as that inside the cell, no net water movement across the plasma membrane |
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Term
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Definition
| solute concentration is greater than that inside the cell; cell loses water |
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Term
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Definition
| solute concentration is less than that inside the cell; cell gains water. |
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Term
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Definition
| the control of solute concentrations and wayer balance, a necessary adaption for life in such environments. |
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Term
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Definition
| hypotonic solution swells until the wall opposes uptake |
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Term
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Definition
| isotonic solution there is no net movement of water into the cell |
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Term
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Definition
| transport proteins speed the passive movement of molecules across the plasma membrane |
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Term
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Definition
| open or close in response to a stimulus |
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Term
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Definition
| moves substances agiasnt their concentration gradient |
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