The purpose of this article is to review the contributions of transmission electron microscopy studies to the understanding of brain circuits and neurotransmitter systems. Our views on the microstructure of connections ...

At the final stage of exocytotis, a fusion pore opens between the plasma and a secretory vesicle membranes; typically, when the pore dilates the vesicle releases its cargo. Sperm contain a large dense-core secretory granule ...

Fifteen individuals of fat snook, Centropomus parallelus, a fish living in estuaries and lagoons in Cananéia, a coastline city in the state of São Paulo, were studied. Their morphological analysis was performed after ...