ANP SECRETION IN THE ATRIA OF SHEEP

The aim of this study was to determine whether sheep' s AN? is species specific and if there is a re-lationship beiween the diet salt coneentrations and AN?. Sheep alrlul extracts were igected into rats and the levels of Na+ , K+ and the osmolality in the plasma and urine were measured iıt order to study the species specifi•ity of ANI'. The role of diet salt concentration in the production of AN? >MS studied . as the rats fed by the food with different can-centration of salt and some determinations were tar-ried out. Results indicates that, when the sheep extracts in-jected into rats, the urine Na+ and K+ levels were increased whereas the osmolality was decreased. When the diet salt concentration increased, plasma and urine Na+ and K+ levels were increased whereas osmolality was decreased. According to this results it is concluded that. ihe elleri of AN? in marnmals may not be species spe-nfic, the facior whieh controls the salt excretion is probably AN?, and plasma and urine Na+ , K+ and osmolality prohably also depend on AN? h•-sides other hormonal effects.