The electrophysiology of single smooth muscle cells isolated from the ctenophore Mnemiopsis

Single, giant, smooth muscle cells were isolated enzymatically from longitudinal muscle bundles in the ctenophore Mnemiopsis . The resting potentials and action potential parameters of the isolated cells were essentially similar. Isolated cells were very permeable to Cl super(-) ion but in Cl super(...

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Bibliographic Details
Published in:Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology Biochemical, systemic, and environmental physiology, 1984-04, Vol.154 (3), p.257-268
Main Author: ANDERSON, P. A. V
Format: Article
Language:English
Subjects:
action potential
Biological and medical sciences
cells
Cnidaria. Ctenaria
Fundamental and applied biological sciences. Psychology
Invertebrates
ions
Marine
Mnemiopsis
muscles
neurophysiology
smooth muscle
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Summary:Single, giant, smooth muscle cells were isolated enzymatically from longitudinal muscle bundles in the ctenophore Mnemiopsis . The resting potentials and action potential parameters of the isolated cells were essentially similar. Isolated cells were very permeable to Cl super(-) ion but in Cl super(-) -free media the resting potential was K super(+) dependent. The action potential in the isolated cell could be partially blocked by D-600, verapamil and Cd super(++). Repolarization was achieved by a TEA- and 4-AP-sensitive, K super(+) efflux, part of which passed through Ca super(+) -activated channels.
ISSN:0174-1578
1432-136X
DOI:10.1007/BF02464405