Evaluation of GIT and Pancreatic function :
1-For detecting gastrointestinal disease, the common clinical
chemistry tests are generally focused on fluid and electrolyte
balance supported by some measures of carbohydrate, lipid, and
protein metabolism . 6-Enzyme changes occur in several gastrointestinal conditions,
such as intestinal infarction or obstruction, parasitic infections,
obstruction of the biliary system, and contraction of the sphincter
of Oddi (the muscular valve surrounding the exit of the bile duct
and pancreatic duct into the duodenum)by drugs such as
morphine, withdrawal of food, and age-related changes .The enzyme may be measured in plasma or gastric
fluid using colorimetric, fluorimetric, or radioimmunometric
methods and ELISA8-Pepsinogen.