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AP - Digestive Syst.
Chapter 17 - Hole's Anatomy and Physiology
What organs are included in the alimentary canal? | mouth pharynx esophagus stomach small intestine large intestine anal canal |
What organs are included in the accessory organs? | salivary glands liver gallbladder pancreas |
What is the outer layer of the alimentary canal? | serosa |
What does the serosa secrete? | serous fluid |
List the wall layers of the alimentary canal starting from the innermost tissue. | 1) mucosa 2) submucosa 3)muscularis externa or muscularis 4)serosa |
Where are the palatine tonsils located? | back of mouth, on either side of tongue and help protect against infections; inflamed - tonsillitis |
Serous cells secrete what digestive enzyme in the mouth? | salivary amylase |
*Match the enzyme(s) with its (their) function(s). Functions may be used more than once. 1)peptidase 2)amylase 3)nuclease 4)lipase 5)pepsin 6)trypsin 7)carboxypeptidase 8)sucrase, maltase lactase | 1 2 D 3 4 5 A 6 7 8 |
*A begins protein digestion B breaks fat into fatty acids + glycerol C proteins into peptides D breaks down starch and glycogen into disaccha E breaks down peptides into AA F breaks down nucleic acids into nucleosides G disaccha. into monosaccha. | |
pepsinogen is activated by what to produce pepsin? | HCl |
What are the small openings in the stomach's inner membrane? | gastric pits |
What do chief cells secrete? | pepsinogen |
Parietal cells secrete? | HCl |
What is required for the absorption of Vitamin B12 and are the parietal cells of the gastric gland? | intrinsic factor |
What hormone inhibits acid secretion in the stomach? | somatostatin |
What does the hormone gastrin do? | increases the secretory activity of gastric glands |
Gastrin promotes the release of what hormone to stimulate additional gastric secretions? | histamine |
List three phases of gastric secretion and briefly describe each | 1) Cephalic - thought, smell, taste, sight triggers gastric juices 2) Gastric- goes into stomach 3) Enteric - food entering small intestine |
peptide hormone in upper small intestine responsible for stimulating the digestion of proteins and fats | cholecystokinin CCK |