Ion current temperature dependence of Br-type neuron of Helix pomatia L.

Vadász, István and Véró, Mihály (1975) Ion current temperature dependence of Br-type neuron of Helix pomatia L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 42. pp. 129-137. ISSN 0365-3005

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Abstract

1. The magnitude of the inward current decreases, the duration of the inward current increases with temperature. 2. The outward current steady state value in the case of low command step values is highest at 7°C, and in the case of 50 mV and higher command steps, it is lowest a t 7°C. 3. The K+ conductance is decreased at low temperaturs in the case of command steps higher than 50 mV. 4. The conditioning hyperpolarization effect is temperature dependent; a temperature increase results in higher activation of both Na+ and K+, but they have a different decrease in their time durations. Thus at higher temperatures an increasing inactivation of the outward current can be ascertained. 5. The temperature dependence of currents measured with Na+ and Ca2 + free solutions is not different from the temperature dependence of currents from the temperature dependence of currents measured with normal physiological solutions.

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