Abstract

The response of the pancreatic bicarbonate secretory mechanism to secretin and the relationship between bicarbonate concentration and flow rate in pancreatic juice have been re-examined following reports describing decreasing levels of bicarbonate concentration at high flow rates. Both anaesthetized and chronic fistula dogs were used. The results show that when high doses of secretin elicit high rates of flow of pancreatic juice the bicarbonate concentration rises to a peak which is constant over a wide range of stimulation and flow rates.