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Comp Biochem Physiol ; 90C(2): 295-303, 1988.
Artigo em Inglês | MedCarib | ID: med-10181

RESUMO

The surface morphology and organization of the neuromuscular system in Cercaria caribbea LXXI are investigated using scanning and transmission electron microscopy, respectively. Direct and indirect (sarconeural) nerve-muscle junctions are identified in the cercarial tail. Synaptic vesicles at the direct neuromuscular junction suggest cholinergic and aminoacidergic transmission. Those at the sarconeural junctions suggest catecholaminergic and/or serotonergic transmission. Acetylcholinesterase and non-specific cholinesterases were found in high concentrations in the proximal and distal tail. Flourescence histochemistry showed primary catecholamines and 5-HT in the body and tail. 5-HT in the tail may represent a slowly depleted store, perhaps associated with energy availability and utilization. (AU)


Assuntos
Parasitos/ultraestrutura , Junção Neuromuscular/fisiologia , Microscopia Eletrônica , Microscopia Eletrônica de Varredura , Colinesterases , Aminas Biogênicas , Músculos/anatomia & histologia , Serotonina/isolamento & purificação , Catecolaminas/isolamento & purificação , Fluorescência
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