Abstract
Summary
1) Concentrations of inorganic phosphorus and creatinine in pancreatic secretion are much lower than their respective concentrations in plasma. 2) Any increase in inorganic phosphorus or creatinine content of plasma leads to proportional increase of their respective concentrations in the pancreatic secretion. 3) Ratios between concentrations of inorganic phosphorus in pancreatic secretion and in plasma remain constant, whatever the inorganic phosphorus content of plasma may be. The same is true for creatinine. 4) Relative lack of permeability for products of protein metabolism seems to be a characteristic of the pancreas, as compared to other digestive glands.
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