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Properties of Lipids
Insoluble in water, soluble in fat and organic solvents
Functions: energy stores, precursors for vitamins and hormones, bile acids (cholic acids), membrane structure
Properties of Phospholips
Polar head group made up of serine, choline, ethanoline, inisol which are attached to the glycerol backbone by ester bonds
Amphipathic - possess both hydrophobic and hydrophilic regions
Factors that increase fluidity of cell membranes
Increase in proportion of short chain fatty acids and unsaturated fatty acids
Factors that reduce fluidity of cell membrane
Cholesterol. (In cirrhosis cholesterol content of the RBCs increase by 20 - 60 % which alters cell shape, impairs oxygen transport and causes erythrolysis and anaemia
Function and examples of structural protiens
Cell to cell contact, cytoskeletal organisation
Eg: actin, spectrin
Function and examples of ion channels
Maintenance of membrane potentials, transmission of action potentials
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