When we ingest large molecules such as lipids, carbohydrates, and proteins, they must undergo catabolic reactions (e.g. hydrolysis) whereby enzymes split these molecules. This series of reactions is called ________.  

  Villi (and microvilli)…..  

  The upper half of the esophagus contains smooth muscle and the lower half contains skeletal muscle.  

  Cholecystokinin (CCK) decreases stomach motility and inhibits release of gastrin.  

  This substance, secreted by the pancreas, helps neutralize acid chyme from the stomach.  

  Pepsinogen is an…..  

  Peristalsis…..  

  All of these are enzymes are involved in protein digestion EXCEPT:   

  Parasympathetic vagus nerve activity ________ release of pancreatic juice.  

  A sphincter is a…..