<prompt> Which of the secretions does have highest HCO3 level?SalivaBileSuccus entericusSuccus entericus  <response>: The pancreatic juice is alkaline and has a high HCO3- content approximately 113 mEqL vs 24 mEqL in plasma. About 1500 mL of pancreatic juice is secreted per day. Bile and intestinal juices are also neutral or alkaline, and these three secretions neutralize the gastric acid, raising the pH of the duodenal contents to 6.0-7.0. By the time the chyme reaches the jejunum, its pH is nearly neutral, but the intestinal contents are rarely alkaline. The pancreatic juice contains also contains a range of digestive enzymes. Ref: Barrett K.E., Barman S.M., Boitano S., Brooks H.L. 2012. Chapter 25. Overview of Gastrointestinal Function Regulation. In K.E. Barrett, S.M. Barman, S. Boitano, H.L. Brooks Eds, Ganongs Review of Medical Physiology, 24e. 