Rio Bio 202 Digestive System 2024 Exam Questions With Answers All Correct

Rio Bio 202 Digestive System 2024 Exam Questions With Answers All Correct swallowing - Answer- series of muscular contractions coordinated by swallowing center in medulla and pons buccal phase - Answer- tongue collects food and pushes it back into oropharynx pharyngeal-esophageal phase - Answer- soft palate rises and block nasopharynx, infrahyoid muscles lift larynx and epiglottis is folded back, and pharyngeal constrictors push bolus down esophagus functions of the stomach - Answer- mechanically breaks up food particles, liquifies the food resulting in a liquid called chyme, chemical digestion of protein and fat, does not absorb any significant amount of nutrients (Except aspirin and some lipid-soluble drugs), all blood drained from stomach goes to liver and returns back to the heart list the 4 regions of the stomach - Answer- cardiac region - just inside cardiac orrifice. fundus - domed portion superior to esophageal opening. body - main portion of organ . pyloric region - narrow inferior end. antrum - funnel part. pyloric canal - terminates at pyloric describe the mucosa of the stomach wall - Answer- made of simple columnar glandular epithelium, and the lamina propia is filled with tubular glands name the 4 cells of the gastric glands and describe the function of each one - Answer- mucous-produce mucous. regenerative-divide to produce new cells that migrate towards surface. parietal-secrete HCl acid and intrinsic factor. cheif-secrete rennin and lipase during infancy, & secrete pepsinogen throughout life. name the main function of pepsin - Answer- partially digests protein what is the first form it is secreted as - Answer- pepsinogen gastric lipase - Answer- a gastric enzyme that digests butterfat of milk in infant chymosin (rennin) - Answer- gastric enzyme that curdles milk by coagulating its proteins gastrin - Answer- chemical messenger that stimulates HCl and enzyme secretions, stimulates intestinal motility, & relaxes ilioececal valve