[A microdissection study of the kidney in the great gerbil Rhombomys opimus in early postnatal ontogeny].

It has been demonstrated that in gerbils, similar to other mammals, superficial nephrons are formed in postnatal ontogenesis in the last turn. However, the development of these nephrons and thin parts of Henle's loops in intracortical and juxtamedullary nephrons takes place earlier than in other mammals, which may be caused by specialization of gerbils to arid conditions.

[Possibilities of deposition of electrolytes in the skin in different states of water-salt metabolism].

Isotonic solutions of NaCl, KCl or MgCl2 (5 ml/100 g body weight) were introduced into the stomach of rodents. Participation of the skin in the water--salt homeostasis involved a temporal unspecific detaining of ions which were subsequently excreted from the organism. The NaCl and KCl loads increased the amount of exchangeable sodium in the skin structures.

Volume and ion regulating renal functions in the big gerbil (Rhombomys opimus L.) and the water vole (Arvicola terrestris L.).

1. After iso-osmotic salt loading (1% NaCl, 1.25% KCl, 0.