5.Name and describe 4 typical layers of GI tract. 1. Mucosa = secretion, absorption, and protection
2. Submucosa = Nutrition and protection 3. Muscularis = regulator of gastrointestinal mobility 4. Serosa = reduce friction and anchor & protect 6.Describe the structure of a tooth. 7.Which organs of GI tract have unusual layer structure? Give examples. 8.Name the nervous plexuses of the GI tract (parts of ENS) and indicate where each is located. 9.Name the glands of digestive system and enzymes made by each. What do those enzymes digest? 10.Name salivary glands; describe composition and functions of saliva.
11.Name enzymes made by pancreatic gland and describe what each digests. a. Pancreatic Amylase – digest starch b. Trypsin – digest protein into peptides c. Pancreatic lipase – the principle triglyceride destine enzyme in adult. d. Ribonuclease – nucleic acid digesting enzymes e. Deoxyribonucleic – digest RNA & DNA into nucleotides 12.Which substances are absorbed in the stomach? 13. Name digestive enzymes produced by the stomach. Enzymes pepsin – digests proteins into small peptides. Secreted as inactive precursor pepsinogen – activated by HCl Enzyme gastric lipase – digests lipids Enzyme lingual lipase (from mouth) – digests lipids 14. What is the name of cells that produce the intrinsic factor? Where are they located? What is the role of “intrinsic factor”?
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