Electronic Resource
Springer
Pflügers Archiv
350 (1974), S. 185-195
ISSN:
1432-2013
Keywords:
Crayfish Stretch Receptor
;
Postsynaptic Inhibition
;
Ammonium
;
Active Chloride Pump
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The actions of intra- and extracellularly applied ammonium ions were studied on membrane potentials of the isolated crayfish stretch receptor neuron. In accordance with results obtained from cat spinal motoneurons, ammonium produced a gradual and reversible shift of the IPSP reversal potential towards the resting potential following both kinds of application. In the concentrations tested extracellularly (3 to 15 mM/l), passive membrane properties, spike generation and inhibitory synaptic transmission showed no alterations. The transient shifts of resting potential and spike amplitude that followed intracellular ammonium injection are comparable with those of injected sodium ions in some respect. Further evidence results for an outwardly directed chloride pump which normally maintains the ionic gradient for hyperpolarizing inhibition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00586236
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