Postabsorptive state

Postabsorptive state - Postabsorptive state: between meals...

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Postabsorptive state : between meals when blood sugar levels are falling o Goal is to maintain blood glucose levels within normal limits (80-100 mg/100 ml) Sources of glucose : glycogenolysis in liver & skeletal muscle cells; lipolysis in adipose tissue & liver (released glycerol is converted to glucose); conversion of keto acids to glucose) Glucose sparing: use of noncarbohydrate molecules for fuel to conserve glucose o Hormonal control : glucagon released by pancreatic islets is a hyperglycemic hormone; it raises blood glucose levels o Neural control : epinephrine released by sympathetic fibers mobilizes fat stores for energy & promotes glycogenolysis - Role of Liver in Metabolism : o Hepatocytes carry out many (≥ 500) metabolic functions o plasma membrane in all cells; also part of embryonic hedgehog protein
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Postabsorptive state - Postabsorptive state: between meals...

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