Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1967 Mar 10;155(3767):1263-6.
doi: 10.1126/science.155.3767.1263.

Crayfish muscle: permeability to sodium induced by calcium depletion

J P Reuben, P W Brandt, L Girardier, H Grundfest

Crayfish muscle: permeability to sodium induced by calcium depletion

J P Reuben et al. Science. .

Abstract

Membrane of crayfish muscle fibers becomes selectively permeable to sodium when the calcium concentration of the bathing medium is reduced. Removal of calcium or its reduction below 1 or 2 millimole per liter causes large transient depolarizations up to 70 millivolts in amplitude. They resemble pro longed action potentials and occur only in the presence of sodium. The responses are abolished when tris(hydroxymethyl)aminomethane or lithium is substituted for sodium, and are blocked by tetrodotoxin even in the presence of sodium.

PubMed Disclaimer

LinkOut - more resources