Term
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Definition
| Define bountary of the cell and its internal compartments |
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Term
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Definition
-regulate the passage of substances into anf out of cells and between cell organelles and cytosol
-detect chemical messages arriving at the cell surface
-link adjacent cells together by membrane junctions
-anchor cells to the extracellular matrix |
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Term
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Definition
model for the structure of all membranes
classified by how things attach and not the function |
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Term
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Definition
| having a polar and nonpolar region like phospholipids |
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Term
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Definition
| amphipathic molecule consisting of a glycerol backbone to which two fatty acids and a phosphate-containingchemicla group are attached |
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Term
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Definition
most common phospholipid
Glyceral based |
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Term
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Definition
| Sphingosine based phospholipid |
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Term
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Definition
Attached to the membrane by being in contact with the hydrophobic core of the bilayer
they are difficult to remove
most common are transmembrane proteins
span the lipid bilayer |
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Term
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Definition
| intergral protein that spans the lipid bilayer, with surface exposed to both the cytosol and interstitial fluid |
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Term
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Definition
Are attached to the hyrophilic surface of the membrane by hydrogen and ionic bonds
easy to remove b/c they are attached to other proteins or membrane lipids |
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Term
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Definition
does not require energy
move from greater concentration to lower concentration |
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Term
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Definition
Requires energy
move from lower concentration to higher concentration |
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Term
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Definition
| passive movement of molecules from one location to another as a result of their own thermal motion |
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Term
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Definition
| passive movement of molecules in response to chemical or electrical forces |
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Term
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Definition
| Difference in energy due to the concentration gradient that causes a molecule to move from an area of high concentration to an area of low concentration |
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Term
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Definition
(difference in concentration)
difference in teh concentration of a substance between regions |
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Term
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Definition
| difference in energy due to a seperation of charge that acts to move ions from high energy to low energy |
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Term
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Definition
| The difference in electric potential or voltage that appears across the membrane of most cells |
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Term
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Definition
| charged atoms or molecule |
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Term
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Definition
| Positively charged atoms or molecule |
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Term
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Definition
| negatively charged atoms or molecule |
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Term
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Definition
Form of potential energy
electric force acting on charged particels and has the potential to cause those particles to move |
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Term
| Electrochemical Driving Force |
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Definition
| the sum of the chemical and electrical driving force |
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