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Cell membrane

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A <gap junction> directly connects the <cytoplasm> of neighbouring <animal cells> through paired intercellular channels. Small <ions> and some small <molecules> pass between <cells>, providing electrical or metabolic coupling. In <cardiomyocytes>, electrical coupling helps coordinate excitation across a <tissue>. This is different from release into extracellular space followed by <receptor> binding, and permeability is selective rather than unrestricted mixing of cellular contents. <Molecular Biology of the Cell, 4th edition by Bruce Alberts and others>[Chapter 19, Gap Junctions]{ref}

Gap junction

Cell junction

Electrical synapse

Neuron

Past exam of the mathematics and the environment and mathematical physiology course of the University of Oxford / 2010 / B / 6 / a / Solution

Synapse

Gap junction

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Gap junction

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