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Digestion und Resorption von Makro- und Mikronährstoffen

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Praxishandbuch klinische Ernährung und Infusionstherapie

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Zusammenfassung

Die wichtigste Aufgabe des Dünndarms ist die Resorption der Nahrung. Nach pankreatischer Vorverdauung erlaubt die große Resorptionsoberfläche des Dünndarms eine effektive terminale Digestion durch die in der Bürstensaummembran der Epithelzellen lokalisierten Enzyme sowie die Resorption der Digestionsendprodukte über verschiedene spezifische Transportprozesse. Die Resorptionsprozesse laufen im Dünndarm mit teils unterschiedlicher Effektivität und Lokalisation ab. Die Wasser- und Elektrolytresorption ist hauptsächlich an die Resorption der Nahrungsbestandteile gekoppelt. Während die Sekretion von Wasser und Elektrolyten überwiegend in der Kryptenregion der Dünndarm-mukosa abläuft, erfolgt die Resorption vorwiegend an den Zotten (Villi; _ Abb. 7-1).

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Authors
  1. W. F. Caspary
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  2. J. Stein
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Editors and Affiliations

  1. Medizinische Klinik II, Zentrum der Inneren Medizin Gastroenterologie/Klinische Ernährung, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Deutschland

    J. Stein

  2. Chirurgische Klinik mit Poliklinik der LMU München-Großhadern, Marchioninistraße 15, 81377, München, Deutschland

    K.-W. Jauch

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Caspary, W.F., Stein, J. (2003). Digestion und Resorption von Makro- und Mikronährstoffen. In: Stein, J., Jauch, KW. (eds) Praxishandbuch klinische Ernährung und Infusionstherapie. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-55896-2_7

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  • DOI: https://doi.org/10.1007/978-3-642-55896-2_7

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-62625-8

  • Online ISBN: 978-3-642-55896-2

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