Membrane potential changes during chemokinesis in Paramecium

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Science  08 Jun 1979:
Vol. 204, Issue 4397, pp. 1100-1103
DOI: 10.1126/science.572085


Intracellular recordings show that (i) paramecia hyperpolarize slightly in attractants and depolarize in repellents that depend on the avoiding reaction (an abrupt change of swimming direction), and (ii) paramecia more strongly hyperpolarize in repellents and more strongly depolarize in attractants that depend on changes of swimming velocity. These membrane potential changes are in agreement with a hypothesis of membrane potential control of chemokinesis in Paramecium.