title: The circadian rhythm of renal excretion in the rat: relationship between electrolyte and corticosteroid excretion.
abstract: In the rat, a circadian rhythm can be demonstrated in plasma levels and in urinary excretion rates of aldosterone and of corticosterone, reflecting rhythmic variations in adrenocortical secretion. There is also a circadian rhythm in the urinary excretion rates of sodium and of potassium in rats with unrestricted food consumption. The rhythmic pattern of potassium excretion seems to be controlled by the rhythm of corticosterone and/or aldosterone, whereas the rhythmic pattern of sodium excretion seems to be independent of adrenocortical secretion.
mesh_terms: D000450:Aldosterone / Q000097:blood / Q000652:urine*; D000818:Animals; D002940:Circadian Rhythm; D003345:Corticosterone / Q000097:blood / Q000652:urine*; D007668:Kidney / Q000502:physiology*; D008297:Male; D011188:Potassium / Q000652:urine*; D051381:Rats; D012964:Sodium / Q000652:urine*
chemical_list: D000450:Aldosterone; D012964:Sodium; D011188:Potassium; D003345:Corticosterone