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Binucleate cells have been found in the glomerular zone of the adrenal cortex in rats subjected to low-sodium diets. By considering the various possibilities for their production, both the findings of nuclei in process of constriction and nuclei identical in form, confronted and smaller in size than those of neighbour cells, are in agreement with an amitotic nuclear division as the possible mechanism for the formation of these cells.

In rats subjected to a low-sodium diet, a great activity was observed of the coated vesicles at Golgi complex and cell surfaces of glomerular adrenal zone. These findings are related to the function of these organoids in the uptake and transport of necessary substances under stimulating conditions of the zone.

Microfilamentous spindle-shaped nuclear rodlets are described in neurons of the retrochiasmatic area in the rat hypothalamus. The authors consider these structures as normal and dynamic nuclear inclusions of these neurons, although their significance remains unknown.

El estudio ultraestructural de las neuronas del nucleo supraoptico de la rata demuestra amplias zonas de aposicion de los somas neuronales y botones sinapticos que son compartidos por dos somas. Los autores postulan que estas estructuras morfologicas pueden ser mecanismos de coordinacion y sincronizacion interneuronal.