The Journal of General Physiology
Axon Instruments microelectrode amplifiers
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents
This Article
Right arrow PDF (Full Text)
Right arrow Alert me when this article is cited
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Alert me to new content in the JGP
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Barr, C. E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Barr, C. E.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
The Journal of General Physiology, Vol 49, 181-197, Copyright © 1965 by The Rockefeller University Press

ARTICLE

Na and K Fluxes in Nitella clavata

Charles E. Barr 1

1 From the Department of Biophysics, University of Maryland School of Medicine, Baltimore.

Dr. Barr's present address is Department of Biology, Duquesne University, Pittsburgh

Na and K influxes and effluxes, membrane potentials, and cell ion concentrations of Nitella clavata were measured as functions of external NaCl concentrations and time. It appears necessary to conclude that active K transport into the cells as well as active Na extrusion is present, although the latter is of small magnitude and possibly is explicable as exchange-diffusion. An attempt has been made to account for the capacity of the cells to discriminate between K and Na ions and yet have fairly independent passive ion movements. This is done by proposing a model in which the permeation areas are "slit-pores" rather than cylindrical pores. The slit-pores would permit rather independent movements of ions within them so long as the pores do not tend to become saturated from both or either side. In the latter case one way movement results. The experimental results are in fair agreement with this suggested model.

Submitted on July 27, 1964


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:


Home page
 ScienceHome page
T. H. Strunk
Vacuolar Perfusion Technique for Nitella Internodal Cells
Science, July 3, 1970; 169(3940): 84 - 87.
[Abstract] [PDF]


  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents