منابع مشابه
The Membrane Components of Crustacean Neuromuscular Systems
I N T R O D U C T I O N Pharmacological data were among the evidence which led to the view that the over-all electrophysiological manifestations of different excitable membranes are composites of a number of independently assorting electrogenic processes (Grundfest, 1961 a, b). Subsequently available data (cf. Grundfest, 1963, 1966 a, b) have reenforced this view, that the excitable membrane is a
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The relative contribution of preand postsynaptic mechanisms to peripheral inhibition has been analyzed in the abdominal slow flexor muscles of crayfish and lobsters. The conductance of the muscle fiber membrane may be increased to five or more times its resting value by repetitive stimulation of the peripheral inhibitory axon, and this effect accounts for all of the attenuation exerted by the i...
متن کاملThermal acclimation in a crustacean neuromuscular system.
1. Effects of temperature on the muscle fibre membrane and synapses of stretcher muscle preparations made from autotomized limbs of the Pacific shore crab (Pachygrapsus crassipes) were investigated. 2. Acclimation of the crabs to different temperatures modified properties of both muscle fibre membrane and synapses. 3. Increased temperature produced an increase in membrane potential of the muscl...
متن کاملThe Modulatory Action of Dopamine on Crustacean Foregut Neuromuscular Preparations
1. Effects of dopamine (DA) on contractile and electrical properties of decapod foregut neuromuscular preparations were examined. 2. Dopamine produced dramatic increases in nerve-evoked contractions and, in particular muscles, contractures and spontaneous contractions. These effects were observed at concentrations as low as 5 x io~~ M-DA. 3. The DA-produced enhancement of nerve-evoked contracti...
متن کاملTemporal dynamics of convergent modulation at a crustacean neuromuscular junction.
At least 10 different substances modulate the amplitude of nerve-evoked contractions of the gastric mill 4 (gm4) muscle of the crab, Cancer borealis. Serotonin, dopamine, octopamine, proctolin, red pigment concentrating hormone, crustacean cardioactive peptide, TNRNFLRFamide, and SDRNFLRFamide increased and -allatostatin-3 and histamine decreased the amplitude of nerve-evoked contractions. Modu...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1967
ISSN: 0003-1569
DOI: 10.1093/icb/7.3.527