Abstract
Light and electron microscopic studies were made on the renal juxtaglomerular cells (JGC) in mice maintained without water supply for one, three or seven days. The index of granularity (Hartroft and Hartroft, 1953) was 49.0, 24.7 and 48.4 on the average, respectively. On the third day of experiment, mature juxtaglomerular cell granules (JGG) decreased in number, and Golgi apparatus was well developed. Near the Golgi region, round or rhomboidal granular structures with a crystalline pattern were found. JGC seemed to be active in forming and releasing JGG. On the seventh day, the feature of JGC differed apparently from that found on the third day. Some JGG tended to fuse into a single large granule with an irregular contour, sometimes having low density. It seems that JGG may have presented a distinct lysosomal nature.
