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Harpers

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INTEGRATION OF METABOLISM—THE PROVISION OF METABOLIC FUELS / 233Glucose 6-phosphateAcyl-CoAGlycerol 3-phosphateADIPOSETISSUETRIACYLGLYCEROL (TG)cAMPFFAGlycerolEXTRAHEPATICTISSUE (eg,heart muscle)FFALPLGlycerolBLOODGlycerolOxidationLPLFFAFFAChylomicronsTG(lipoproteins)GASTRO-INTESTINALTRACTGlucoseVLDLExtraglucosedrain (eg,diabetes,pregnancy,lactation)GlucoseKetone bodiesFFATGLIVERGlucoseAcyl-CoAGlycerol 3-phosphateAcetyl-CoACitricacidcycle2CO 2Amino acids,lactateGluconeogenesisGlucose 6-phosphateGlycogenFigure 27–1. Metabolic interrelationships between adipose tissue, the liver, and extrahepatictissues. In extrahepatic tissues such as heart, metabolic fuels are oxidized in the following order ofpreference: (1) ketone bodies, (2) fatty acids, (3) glucose. (LPL, lipoprotein lipase; FFA, free fattyacids; VLDL, very low density lipoproteins.)

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