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Miniature excitatory synaptic ion currents in the earthworm Lumbricus terrestris body wall muscles
E.M. Volkov, L.F. Nurullin, E. Nikolsky, F. Vyskočil
Language English Country Czech Republic
NLK
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- MeSH
- Excitatory Postsynaptic Potentials genetics MeSH
- Ion Channels physiology MeSH
- Oligochaeta anatomy & histology physiology MeSH
- Receptors, Cholinergic physiology MeSH
- Muscle Cells physiology MeSH
The miniature excitatory postsynaptic currents (MEPCs) of the muscle cells of the earthworm Lumbricus terrestris were recorded by glass microelectrodes. In a single synaptic zone, three types of MEPC were recorded: a fast singleexponential type that decayed with ? =0.9 ms, a slow single-exponential with ? = 9.2 ms and a two-exponential MEPC with ? = 1.3 and 8.5 ms, respectively. The muscle cells of earthworms contain populations of yet-unidentified ionic channels that might be different from the common nicotinic and muscarinic groups of acetylcholine receptors, since these MEPCs are not sensitive to d-tubocurarine, atropine, benzohexonium or proserine. Alternatively, besides ACh receptors, the membrane may contain receptors for another yet-unidentified excitatory transmitter.
Lit.: 19
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- $a State Medical University, Kazan
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- $a Lit.: 19
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- $a The miniature excitatory postsynaptic currents (MEPCs) of the muscle cells of the earthworm Lumbricus terrestris were recorded by glass microelectrodes. In a single synaptic zone, three types of MEPC were recorded: a fast singleexponential type that decayed with ? =0.9 ms, a slow single-exponential with ? = 9.2 ms and a two-exponential MEPC with ? = 1.3 and 8.5 ms, respectively. The muscle cells of earthworms contain populations of yet-unidentified ionic channels that might be different from the common nicotinic and muscarinic groups of acetylcholine receptors, since these MEPCs are not sensitive to d-tubocurarine, atropine, benzohexonium or proserine. Alternatively, besides ACh receptors, the membrane may contain receptors for another yet-unidentified excitatory transmitter.
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- $a Oligochaeta $x anatomie a histologie $x fyziologie $7 D009835
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- $a svalové buňky $x fyziologie $7 D032342
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- $a Vyskočil, František, $d 1941- $7 jk01151227
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- $w MED00003824 $t Physiological research $g Roč. 56, č. 5 (2007), s. 655-658 $x 0862-8408
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- $u http://www.biomed.cas.cz/physiolres/pdf/56/56_655.pdf $y plný text volně přístupný
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