Magnesium excretion in the dog studied by stop-flow analysis

Abstract
Stop-flow analysis performed in the dog using Mg-28 demonstrated active reabsorption of magnesium in the proximal portion of the distal nephron. ‘Interrupted’ stop-flow analysis failed to document the existence of a renal tubular secretory mechanism for magnesium. During magnesium-loading reabsorption of potassium occurs in the distal nephron despite the presence of hyperkalemia.

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