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Metabolism of Carbohydrates

  • Kurt Jungermann
  • Norbert Katz

Abstract

The liver can be regarded as the center of intermediary metabolism of the organism. It removes glucose if in excess, as after a normal carbohydrate-rich meal, via glycogen synthesis and glycolysis plus liponeogenesis, and it liberates glucose if needed, as between meals, via glycogen degradation and gluconeo-genesis. It alone produces ketone bodies and has a major role in lipoprotein metabolism (see Chapter 10). The liver detoxifies ammonia and amino acid nitrogen by the synthesis of urea and glutamine (see Chapter 11). The major pathways of energy production are the β-oxidation of fatty acids and the degradation of amino acids. This chapter first reviews how the liver functions as a glucostat in different dietary situations. It then briefly summarizes the regulation of carbohydrate metabolism by the extracellular levels of substrates and hormones, and by the hepatic nerves, and finally shows how hepatocyte heterogeneity might be involved in regulation.

Keywords

Pyruvate Kinase Glycogen Synthesis Glycogen Phosphorylase Glycogen Metabolism Perivenous Zone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Kurt Jungermann
    • 1
  • Norbert Katz
    • 1
  1. 1.Institut für BiochemieUniversität GöttingenGöttingenFederal Republic of Germany

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