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Updated: Aug 16, 2026

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles
10:30

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles

Published on: October 15, 2014

Neuronal sodium channels in ventricular heart cells are localized near T-tubules openings

Hervé Duclohier1

  • 1Institut de Physiologie et Biologie Cellulaires (PBS), UMR 6187 CNRS-Université de Poitiers, France. Herve.Duclohier@univ-poitiers.fr

Biochemical and Biophysical Research Communications
|July 26, 2005
PubMed

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Voltage-gated Ion Channels

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The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
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Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
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Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
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