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Resorption von Nährstoffen, Mineralien und Vitaminen

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Darmkrankheiten

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 Dünndarmmukosa abläuft, erfolgt die Resorption vorwiegend an den Zotten (Villi; Abb. 2.1).

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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, Johann Wolfgang Goethe Universität, Theodor-Stern-Kai 7, 60950, Frankfurt/Main, Deutschland

    Wolfgang F. Caspary  & Jürgen Stein  & 

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Caspary, W.F., Stein, J. (1999). Resorption von Nährstoffen, Mineralien und Vitaminen. In: Caspary, W.F., Stein, J. (eds) Darmkrankheiten. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59960-6_2

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  • DOI: https://doi.org/10.1007/978-3-642-59960-6_2

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64197-8

  • Online ISBN: 978-3-642-59960-6

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