Term
| Functions of Plasma membrane |
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Definition
-covers surface of cell -regulates transport of molecules into/out of cell -Protection: against foreign molecules (recognition) -Cell communication -Provide shape/form -Cell to Cell adhesion |
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Term
Composition of Plasma Membrane |
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Definition
-Phospholipids* -Sterols^ -Proteins^ ^(S&P Mostly Hydrophobic are of membrane) -Carbohydrates -Cholesterol |
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Term
Antiport (exchange diffusion) |
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Definition
| type of secondary active transport in which the driving ion moves through membrane channel in one direction, providing the energy for the active transport of another molecule in the opposite direction. |
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Term
Integral Proteins (functions, etc.) |
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Definition
Embedded completely in the phospholipid bi-layer Functions: transport, recognition of like cells, receptors, adhesion. |
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Term
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Definition
Held to membrane by covalent bonds.(mostly cytoplasmic) Functions: some are part of cytoskeleton, or proteins that link cytoskeleton together, hold some integral proteins in place. |
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Term
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Definition
type of secondary active transport in which the solute moves through the membrane channel in the same direction as the driving ion. ex) sugars (glucose), and amino acids use symport. |
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Term
| What does the "fluid" part of the fluid mosaic model refer to? |
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Definition
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Term
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Definition
| indicator of the # of molecules of a particular type present in a given volume |
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Term
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Definition
presence of a difference in concentration of 2 components - form of potential energy |
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Term
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Definition
The constant, random motion of molecules |
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Term
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Definition
| Specialized water channels running through integral proteins through which water molecule diffusion is facilitated. |
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Term
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Definition
| the protein that transports a substance also hydrolyzes ATP to power the transport |
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Term
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Definition
| network of proteins which reinforce the cytoplasmic side of the plasma membrane during receptor-mediated endocytosis. |
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Term
| Simple Diffusion depends on: |
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Definition
-molecule size -polarity -temperature -structure of membrane |
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Term
Osmotic Potential (animals) |
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Definition
pure H2O = osmotic potential of 0 - presence of any solute lowers osmotic potential (negative numbers) |
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Term
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Definition
pure H2O= water potential of 0 -addition of any solutes lowers water potential (negative numbers) |
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