Atriopeptins in fluid and electrolyte homeostasis.

Atriopeptins are biologically active peptides with potent natriuretic, diuretic, and vasorelaxant activities. Manipulation of an animal's salt and water intake influences the synthesis, storage, and release of atriopeptin. In addition to its direct effects on fluid and electrolyte balance, atriopeptin influences other volume regulatory hormones, including renin, aldosterone, and vasopressin. Atriopeptin, by its direct actions and its effects on hormone systems, provides a means for delicate hormonal control of fluid and electrolyte homeostasis.