BMS 251 Lecture 8: Digestive Lab
Document Summary
Functions: stomach: mixes the ingested food with secretions released from the stomach wall and mechanically digests the contents into a semifluid mass called chyme, small intestine:receives chyme from the stomach that is then mixed with accessory organ secretions. Identify the enzyme secreted by the salivary glands that begins the digestion of starch. Salivary amylase in the saliva also lingual lipase, an enzyme that begins the digestion of triglycerides. Chewing, process by which food is crushed and grinded by the teeth. The first step in digestion, increases surface area of food to allow a more efficient break down performed by the enzymes. Explain how material is propelled down the esophagus. Esophageal peristalsis results from sequential contraction of circular muscle, which serves to push the ingested food bolus toward the stomach. Esophageal longitudinal muscle may also play a role in peristalsis. Describe the function of the mucosal layer of the esophagus.
