Pathophysiology of potassium absorption and secretion by the human intestine.

@article{Agarwal1994PathophysiologyOP,
  title={Pathophysiology of potassium absorption and secretion by the human intestine.},
  author={Rajiv M. Agarwal and R G Afzalpurkar and John S. Fordtran},
  journal={Gastroenterology},
  year={1994},
  volume={107 2},
  pages={548-71}
}
When normal people ingest 90 mEq/day of K+ in their diet, they absorb about 90% of intake (81 mEq) and excrete an equivalent amount of K+ in the urine. Normal fecal K+ excretion averages about 9 mEq/day. The vast majority of intestinal K+ absorption occurs in the small intestine; the contribution of the normal colon to net K+ absorption and secretion is trivial. K+ is absorbed or secreted mainly by passive mechanisms; the rectum and perhaps the sigmoid colon have the capacity to actively… CONTINUE READING
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