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Ch 23
The Digestive System
| Question | Answer |
|---|---|
| Which of the following processes is the function of the smooth muscle layer of the digestive system | mixing and propulsion |
| Which of the following processes is the primary function of the mouth | ingestion |
| Which of the following processes is the primary function of the villi of the small intestine | absorption |
| Which of the following accessory organs produces a fluid to soften and moisten food | salivary glands |
| Which of the following accessory organs stores bile | liver |
| Which of the following accessory organs of the digestive system produces a fluid that function to emulsify dietary fats | gallbladder |
| These are composed of prominent lymphatic nodules that function in the immune response | MALT |
| This specific plexus is located between the longitudinal and circular smooth muscle layers of the muscularis | myenteric plexus |
| Why would you expect emotions such as anger or fear slow digestion | because they stimulate the sympathetic nerves that supply the GI tract |
| This portion of the peritoneum drapes over the transverse colon and coils of the small intestine | greater omentum |
| The hard palate | all of the preceding |
| In the mouth, the tooth sockets are lined with | periodontal ligament |
| Deciduous molars are replaced by | premolars (bicuspids) |
| Which of the following is the primary function of the large intestine | feces formation |
| This structure of the stomach allows greater distension for food storage | rugae |
| Which of the following secrete gastric acid | parietal cells |
| This cell secretes the hormone that promotes production of gastric acid | G ell |
| This major duct carries a fluid rich in bicarbonate ions | pancreatic duct |
| Which of the following gastric enzymes digests proteins | pepsin |
| This is the heaviest gland of the body | liver |
| This is found on the liver and is a remnant of the umbilical cord in the fetus | round ligament |
| This is the principle bile pigment | bilirubin |
| Which of the following is NOT a function of the liver | storage of bilirubin |
| Which of the following small intestine cells secrete lysozyme | Paneth cells |
| Which of the following enzymes acts to produce monoglycerides and fatty acids as products | lipase |
| Which of the following pancreatic enzymes acts to produce monosaccharides | amlayse |
| Which of the following pancreatic enzymes acts to produce smaller peptides from proteins | chymotrypsin |
| This hormone functions to counteract the effect of gastric acid in the small intestine | secretin |
| This hormone is stimulated by high levels of dietary fat in the small intestine | cholecystokinin (CCK) |
| This digestive aid, produces by the stomach, begins digestion by denaturing proteins | hydrochloric acid |
| This structure regulates the flow of material into the colon | ileocecal |
| The wavelike, rhythmic contractions that move food through the digestive tract are called | peristalsis |
| The pyloric sphincter is found between the | stomach and duodenum |
| The pancreas is stimulated to release its secretions by | secretin |
| The physical and chemical breakdown of food is completed primarily in the | small intestine |
| Gastric glands increase their secretory activity in response to a hormone released from the | stomach |
| The space between the parietal and visceral peritoneum is the _____ cavity | peritoneal |
| The intrinsic factor is produced by ___ cells of the gastric glands | parietal |
| Digestion begins in the | mouth |
| Taste buds are found in elevations on the dorsal surface of the tongue called | papillae |
| What are the names of the three sections of the small intestine | duodenum, jejunum, ileum |
| The final products of protein digestion are | amino acids |
| Absorption of nutrients occurs primarily in the | small intestine |
| Which hormone stimulates secretion of pancreatic juice that is rich in digestive enzymes and contraction of the wall of the gallbladder to release bile | cholecystokinin |
| The inner surface of each lip is attached to the gum by a midline fold of mucous membrane called the | labial frenulum |
| Mumps is a viral infection, inflammation, and enlargement of the | parotid salivary glands |
| During the act of deglutition | food moves from the oral cavity to the stomach |
| The dental formula of the deciduous teeth in humans is | 2-1-0-2 |
| The dental formula of the permeant teeth in humans is | 2-1-2-3 |
| Wisdom teeth are this late erupting type | molars |
| Some organs or part of organs 'within' the abdominal cavity are retroperitoneal | True |
| The serosa of the GI tract is the same as the layer known as the parietal peritoneum | False |
| The greater omentum is the largest of the paritoneal folds | True |
| The localized mixing contractions and relaxations of the muscularis that do not push along the GI tract is called peristalsis | False |
| Some digestion occurs at the surface of the absorptive cells of the small intestine, rather than in the lumen | True |
| Some digestive enzymes are released when absorptive cells slough off into the lumen of the small intestine | True |
| Peyer's patches are found in the wall of the ileum | True |
| Nearly all digestive enzyme precursors secreted into the GI tract are identified by having the prefix 'pro' or the suffix 'ogen' | True |
| The round ligament is a remnant of the ductus arteriosus, a vessel found in fetal circulation | False |
| Carbonic acid is the source for H+ (protons) that are pumped out of the parietal cells into the lumen of the stomach | True |
| HCl is necessary for the activation and activity of pepsin in the stomach | True |
| The hepatic portal vein delivers deoxygenated blood from the GI tract to the sinusoids of the liver | True |
| The sight, smell, taste, or thought of food initiates the cephalic phase of gastric activity | True |
| Both neural and hormonal factors regulate the gastric and intestinal phases of digestion | True |
| Processed blood from the liver returns to the systemic circulation by way of the hepatic vein | True |
| The end products of chemical digestion of complex carbohydrates and double sugars are ___ | monosaccharides |
| The end products of chemical digestion of lipids (triglycerides) are _____ and ____ | monoglycerides, fatty acids |
| The end products of chemical digestion of proteins are ___ ___ | amino acids |
| Lipases break down this nutrient group ____ | lipids |
| Proteases break down this nutrient group ___ | proteins |
| Individuals who do not produce adequate amounts of the enzyme lactase are said to be ___ ____ | lactose intolerant |
| The lymphatic capillary found in a villus is specifically called a ____ | lacteal |
| _____ is the specific term that describes the movement of a bolus from the mouth to the stomach | Deglutition |
| The four principal anatomic regions of the stomach are the: cardia, the _____, the _____, and the _____ | fundus, body, pylous |
| Intrinsic factor is released by the ____ cells in the stomach mucosa and is important for the absorption of vitamin ___ that is needed for erythropoiesis | pariteal, B12 |
| Responsible for churning, peristalsis, storage, and chemical digestion with the enzyme pepsin | Stomach |
| Responsible for ingestion, mastication, and deglutition | Mouth |
| Contains aggregated lymphatic follicles in the submucosa | Ileum |
| Produces and secretes bile | Liver |
| Contains duodenal glands in the submucosa | Duodenum |
| Coiled tube of lymphatic tissue attached to the cecum | Appendix |
| Collapsed muscular tube involved in the deglutition and peristalsis | Esophagus |
| Produce a fluid in the mouth that helps cleanse the mouth and that lubricates, dissolves, and begins the breakdown of food | Salivary gland |
| Forces the food to the back of the mouth for swallowing; places food in contact with the teeth | Tongue |
| Forms a semisolid waste material through haustral churning and peristalsis | Colon |
| Passageway for food, fluid and air; involved in deglutition | Pharynx |
| Composed of enamel, dentin, and pulp; used in mastication | Teeth |
| Contain 'acini' that release juices containing several digestive enzymes and sodium bicarbonate to buffer stomach acid | Pancreas |
| Storage area for bile | Gallbladder |
| Lymphatic capillary used for chylomicron absorption in the small intestine | Lacteal |
| Longitudinal muscular bands in the large intestine; tonic contractions produce haustra | Teniae coli |
| Stomach enteroendocrine cells that secrete gastrin | G cells |
| Secrete lysozyme; help regulate microbial population in the intestines | Paneth cells |
| Produce HCl and intrinsic factor in the stomach | Parietal cells |
| Finger or ridge-like projections of the mucosa of the small intestine that increase the surface area for digestion and absorption | Villi |
| Layer of microvilli of the small intestine that increase the surface area for absorption; also contain some digestive enzymes | Brush border |