Describe the general pathways and end products of carbohydrate and lipid metabolism in each of the...

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Biology

Describe the general pathways and end products of carbohydrateand lipid metabolism in each of the following mammalian tissues: a)Liver b) Adipose c) Muscle (skeletal and heart) d) Brain tissues e)Blood

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Answer Carbohydrate and LipidmetabolismaLiverHepatocytes are metabolic overachievers in the body They playcritical roles in synthesizing molecules that are utilizedelsewhere to support homeostasis in converting molecules of onetype to another and in regulating energy balances If you havetaken a course in biochemistry you probably spent most of thatclass studying metabolic pathways of the liver At the risk ofdamning by faint praise the major metabolic functions of the livercan be summarized into several major categoriesCarbohydrate MetabolismIt is critical for all animals to maintain concentrations ofglucose in blood within a narrow normal range Maintainance ofnormal blood glucose levels over both short hours and long daysto weeks periods of time is one particularly important function ofthe liverHepatocytes house many different metabolic pathways and employdozens of enzymes that are alternately turned on or off dependingon whether blood levels of glucose are rising or falling out of thenormal range Two important examples of these abilities areExcess glucose entering the blood after a meal is rapidly takenup by the liver and sequestered as the large polymer glycogen aprocess called glycogenesis Later when bloodconcentrations of glucose begin to decline the liver activatesother pathways which See Answer

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