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Ion Transport Across the Large Intestine

Dan R. Halm, Raymond A. Frizzell

10.1002/cphy.cp060408

Source: Supplement 19: Handbook of Physiology, The Gastrointestinal System, Intestinal Absorption and Secretion

Originally published: 1991

Published online: January 2011

Full Article on Wiley Online Library



Abstract

The sections in this article are:

1 Active Transport Processes
2 Active Ion Absorption
2.1 Electrogenic Sodium Absorption
2.2 Coupled Sodium Chloride Absorption
2.3 Potassium Absorption
3 Active Ion Secretion
3.1 Chloride Secretion
3.2 Potassium Secretion
4 Diffusional Transepithelial Ion Flow
5 Relation of Transport Function to Epithelial Morphology
6 Regulation of Ion Transport
6.1 Modulation of Absorption and Secretion
6.2 Corticosteroid Hormones
7 Segmental Differences in Transport
8 Integration of Intestinal Function
Figure 1. Figure 1.

Model for electrogenic Na+ absorption. Schematic shows epithelium separating mucosal solution from serosal solution.
Figure 2. Figure 2.

Electrical equivalent circuit for electrogenic Na+ absorption or Cl− secretion. Ea, apical equilibrium potential; Eb, basolateral equilibrium potential; Ep, paracellular equilibrium potential; Ra, apical resistance; Rb, basolateral resistance; Rp, paracellular resistance.
Figure 3. Figure 3.

Model for coupled NaCl absorption.
Figure 4. Figure 4.

Model for K+ absorption.
Figure 5. Figure 5.

Model for electrogenic Cl− secretion.


Figure 1.

Model for electrogenic Na+ absorption. Schematic shows epithelium separating mucosal solution from serosal solution.



Figure 2.

Electrical equivalent circuit for electrogenic Na+ absorption or Cl− secretion. Ea, apical equilibrium potential; Eb, basolateral equilibrium potential; Ep, paracellular equilibrium potential; Ra, apical resistance; Rb, basolateral resistance; Rp, paracellular resistance.



Figure 3.

Model for coupled NaCl absorption.



Figure 4.

Model for K+ absorption.



Figure 5.

Model for electrogenic Cl− secretion.

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Article Title: Ion Transport Across the Large Intestine
 

How to Cite

Dan R. Halm, Raymond A. Frizzell. Ion Transport Across the Large Intestine. Compr Physiol 2011, Supplement 19: Handbook of Physiology, The Gastrointestinal System, Intestinal Absorption and Secretion: 257-273. First published in print 1991. doi: 10.1002/cphy.cp060408