Active Transport of Potassium and Chloride in an Identifiable Molluscan Neuron

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Science  31 Mar 1972:
Vol. 175, Issue 4029, pp. 1475-1477
DOI: 10.1126/science.175.4029.1475


Direct measurements of intracellular K+ and Cl-activities before and after blockage of cellular metabolic processes indicate that K+ is actively transported inwardly and Cl-is actively transported outwardly from the giant cell of the abdominal ganglion of Aplysia. The rewarming of cells that have been cooled to 1° ± 1°C causes K+ to be taken up and Cl- to be extruded against electrochemical gradients.