Over half of the potassium that appears in the urine of a patient, who has ingested some potassium salts, is derived From?
Correct Answer: Secretion by the distal tubule
Description: Secretion by the distal tubule.With a normal potassium intake filtered K+ (which is not reabsorbed) accounts for two third and secreted K+ counts for one-third of the excreted urinary K+.However, on high potassium diet, the K+ secretion increases and K+ secretion account for about 60-65% excreted K+.K+ secretion occurs in distal tubules and collecting duct.
Category:
Physiology
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