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Carbohydrate Metabolism and the Regulation of Blood Glucose

  • F. John Ballard

Abstract

Many differences in carbohydrate metabolism in the fetus, newborn, and adult are related to the changing nutritional environment of the various ages. The fetus is characterized by having a constant and plentiful supply of glucose, which, except in ungulates, is not normally accompanied by other hexoses. The newborn, on the other hand, obtains only small amounts of glucose due to the low carbohydrate content of milk. There is therefore a changeover at birth from a high-carbohydrate to a high-fat diet, and many of the alterations in metabolic pathways can be interpreted in this context. I would also like to emphasize that although the relative importance of carbohydrate as a nutrient for adults will differ among herbivorous, carnivorous, and omnivorous mammals, and will be apparent from measurements of pathway activities, only minor nutritional differences are seen when interspecies comparisons are made between fetuses or neonates. Accordingly, the observations made on fetal and newborn experimental animals can often be extrapolated to the human infant. Where differences have been noted, attention will be drawn to them.

Keywords

Fetal Liver Human Infant Glycogen Storage Disease Pyruvate Carboxylase Phosphoenolpyruvate Carboxykinase 
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 Publishing Corporation 1978

Authors and Affiliations

  • F. John Ballard
    • 1
  1. 1.Division of Human NutritionCSIROAdelaideAustralia

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