Peroxidase Uptake by Glial Cells in Desheathed Ganglia of the Cockroach


THE axons of some insect species are unusual in their ability to function for appreciable periods in intact ganglia and connectives bathed in sodium-deficient media1–3. The action potentials of axons of the cockroach, Periplaneta americana, and those of stick insects, Carausius morosus, appear, nevertheless, to be mediated by conventional sodium-dependent mechanisms2–4. In both these species desheathing the nerves or ganglia before bathing in sodium-free solutions leads to a rapid decline in excitability1–3,5, suggesting that in intact preparations there is a regulation of the sodium concentration in the fluid immediately bathing the axonal surfaces.

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LANE, N., TREHERNE, J. Peroxidase Uptake by Glial Cells in Desheathed Ganglia of the Cockroach. Nature 223, 861–862 (1969).

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