Abstract:Using an improved segmented flow technique the uptake of salicylate in low concentration (1-3 mM) by rat jejunum is found to be steady for ca. 30 min, and is proportional to lumen concentration. At higher lumen concentrations (6-8 mM) the rate of uptake falls from the beginning to very low levels. At low lumen concentrations the tissue fluid concentration rises to approximately three times the lumen concentration without significant effect on the uptake rate. This rise is an exponential function of the net wat… Show more
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