title: [Ratio of cations in hemolymph, blood serum of aquatic and terrestrial organisms].
abstract: A wide range of differences of cations concentrations (Na, K, Ca, Mg) in hemolymph, blood serum of multicellular animals and humans was revealed. It was established that constancy of K/Na ratio 0.034 +/- 0.001 is strictly maintained in these organisms. Except for some freshwater and marine organisms, Mg/Na ratio is sustained on the same level in the wide range of concentrations of these ions in serum of vertebrates and hemolymph of invertebrates. Ca/Na ratio is higher in hemolymph of freshwater mollusks. The question about possible reasons of physiological differences of Ca/Na and Mg/Na rations compared to constancy of K/Na ratio is discussed.
authors.forename: Iu V
authors.initials: IuV
authors.lastname: Natochin
authors.forename: E I
authors.initials: EI
authors.lastname: Shakhmatova
mesh_terms: D000663:Amphibians / Q000097:blood; D000818:Animals; D059001:Aquatic Organisms / Q000378:metabolism; D001181:Arthropods / Q000378:metabolism; D001717:Birds / Q000097:blood; D002118:Calcium / Q000097:blood*; D002413:Cations, Divalent; D002414:Cations, Monovalent; D005399:Fishes / Q000097:blood; D006458:Hemolymph / Q000737:chemistry*; D006706:Homeostasis / Q000502:physiology; D006801:Humans; D008274:Magnesium / Q000097:blood*; D008322:Mammals / Q000097:blood; D008974:Mollusca / Q000378:metabolism; D011188:Potassium / Q000097:blood*; D012104:Reptiles / Q000097:blood; D044967:Serum / Q000737:chemistry*; D012964:Sodium / Q000097:blood*
chemical_list: D002413:Cations, Divalent; D002414:Cations, Monovalent; D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium