This study guide will not contain everything that will be on the exam, but it will help organize your notes to study. Please study the brs, the powerpoints, and your lecture notes: digestive system, anatomy of digestive system, oral cavity (teeth, tongue, saliva, etc) - -esophagus-- -stomach-- --small. Intestine-- -(liver, pancreas, gallbladder)----large intestine: autonomic nervous system control. Sympathetic nervous system slows down peristalsis: neurotransmitter: norepinephrine. Submucosal plexus of meissner: myenteric plexus of buerbach. Both contain sympathetic fibers: slow wave vs. spike wave production. Swallowing: coordinated in the medulla, cranial nerves 9 and 10, nasopharynx epiglottis closes, laryngeal muscles contract, upper esophageal sphincter relax (peristalsis begins, esophagus, upper esophageal sphincter, relaxes to let food in, contracts to prevent food reflux. Symptoms: gastric reflux, increased l. e. s pressure, retrosternal pain, type b: para esophageal hiatal hernia, hernia in fundus of stomach, no regurgitation/ no gastric reflux. Fundoplication: fundus is wrapped around stomach: radiofrequency treatment: burns tissue around hiatus to tighten valve.