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Electrical and mechanical responses of the odontophore protractor muscle of Busycon canaliculatum: a sucrose-gap voltage clamp study.

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  • H. Huddart
  • I. D. Nelson
  • D. D. Brooks
  • R. B. Hill
<mark>Journal publication date</mark>1992
<mark>Journal</mark>Comparative Biochemistry and Physiology Part C: Toxicology and Pharmacology
Issue number1
Number of pages10
Pages (from-to)149-158
Publication StatusPublished
<mark>Original language</mark>English


Busycon odontophore protractor muscles were examined by conventional force recording and by the single and double sucrose-gap voltage clamp technique. The mean compound resting membrane potential was -61.3 mV and the muscles showed considerable mechanical summation in response to direct electrical stimulation. 2. Responses to high K+ salines consisted of a maintained dose-dependent depolarization upon which were superimposed spike-like action potentials of 3-9 mV each of which generated a fast twitch contraction