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Journal of Experimental Biology 78,201-211 (1979)
Published by Company of Biologists 1979

Thermal Acclimation of a Central Neurone in Helix Aspersa : III. Ionic Substitution and Related Studies

C. K. LANGLEY 1

1 Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 2EJ, U.K.

(1) Thermal acclimation of the Fi neurone does not appear to result from changes in the chemical composition of the haemolymph. This is deduced from the lack of effect on the electrical characteristics of control neurones of either pooled haemolymph from acclimated individuals, or variations in the experimental salines made in accordance with haemolymph analyses.

(2) Changes in [Ca]0 tended to act cooperatively with temperature shifts to induce alterations in the electrical properties of the neurone, notably to increase excitability and lower membrane resistance.

(3) Warm acclimation was associated with increased resting conductance of the neuronal membrane to sodium and potassium, whereas chloride conductance appeared little affected.






© The Company of Biologists Ltd 1979