Separates living cell from non living surroundings.
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Glycoprotien
Carbohydrate and protien.
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Glycolipid
Carbohydrate and lipid.
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Transmembrane protien
Transport molecules and ions.
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Peripheral protien
Loosely bound to membrane surface/cell surface identity marker.
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Cholestral
Affects fluidity of the membrane and prevents too much movement in the bi-layer. Too much cholestral stops movement.
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Filament of cytoskeleton
Runs through cytoplams giving the cell a loose structure.
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Diffusion
Movement of lipid soluble molecules or ions from a region of high to low concentration through the phospholipid bi-layer.
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Facilitated diffusion
Movement of polar molecules or ions from a region of high to low concentration through protein channels.
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Active transport
Movement of molecules against a concentration gradient from a region of low to high concentration through protein pumps. Requires energy as ATP and cannot work in the presence of a respiratory inhibitor, eg. cyanide.
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Exocytosis
The movement of bulk material out of the cell.
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Endocytosis
The movement of bulk material into the cell.
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Phagocytosis
Solid material in.
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Pinocytosis
Liquid material in.
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Osmosis
A particular form of diffusion in which water molecules move down a W gradient, from a high W to a low W, through a selectively permeable membrane.
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Water Potential
Water has the tendency to move from a region of high water concentration to low water concentration.
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