Am J Physiol Cell Physiol Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Am J Physiol Cell Physiol 246: C315-C322, 1984;
0363-6143/84 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Halm, D. R.
Right arrow Articles by Dawson, D. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Halm, D. R.
Right arrow Articles by Dawson, D. C.

AJP - Cell Physiology, Vol 246, Issue 3 315-C322, Copyright © 1984 by American Physiological Society

ARTICLES

Potassium transport by turtle colon: active secretion and active absorption

D. R. Halm and D. C. Dawson

Measurement of transepithelial potassium fluxes in the absence of transmural electrochemical potential gradients showed that the isolated turtle colon can actively absorb and actively secrete K+. Under short-circuit conditions the active secretory flow was inhibited by mucosal amiloride, whereas the absorptive flow was unaffected by the diuretic. The effects of ouabain and barium on secretory flow were consistent with a simple model involving basolateral uptake by an Na+-K+-ATPase and conductive exist across the apical and basolateral membranes. The active absorptive flux was blocked by mucosal ouabain and by serosal barium. The opposing active flows clearly represented cellular K+ transport, whereas paracellular K+ flows behaved as expected for a free-solution shunt.


This article has been cited by other articles:


Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
M. Diaz, V. Medina, T. Gomez, and A. Lorenzo
Membrane mechanisms for electrogenic Na+-independent L-alanine transport in the lizard duodenal mucosa
Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2000; 279(3): R925 - R935.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online