<prompt> Centroacinar cells of the Pancreas secrete :Alkaline enzyme-poor fluidPancreatic digestive enzymesSecretinCholecystokininCCK  <response>: Pancreatic Centroacinar cells Form the initial segment of the intercalated duct Pa of the exocrine pancreas. Secrete an enzyme-poor alkaline fluid when stimulated by secretin. -Pancreatic digestive enzymes are synthesized by the acinar cells of the exocrine pancreas; their release is stimulated by cholecystokinin. -Glucagon is produced in the endocrine pancreas islets of Langerhans. 