Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 12 October 1984:
Vol. 226. no. 4671, pp. 174 - 177
DOI: 10.1126/science.6091269
Prev | Table of Contents | Next

Articles

Science, Vol 226, Issue 4671, 174-177
Copyright © 1984 by American Association for the Advancement of Science

articles

Optical measurements of extracellular calcium depletion during a single heartbeat

L Cleemann, G Pizarro, and M Morad

The impermeant dye antipyrylazo III was used to measure depletion of extracellular calcium and net influx of calcium through the sarcolemma during the cardiac action potential. It was found that calcium entry occurs continuously during the action potential and is under direct control of the membrane potential. The inotropic action of epinephrine is accompanied by increased influx of calcium, while strophanthidin enhances the twitch without altering calcium influx during the action potential.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Another dimension to calcium signaling: a look at extracellular calcium.
A. M. Hofer (2005)
J. Cell Sci. 118, 855-862
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)