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Histology
GI Glands
| Question | Answer |
|---|---|
| what branch of the autonomic nervous system increases the secretion of saliva? | parasympathetic |
| the contraction of these cells are what cause increased saliva secretion | myoepithelial cells |
| these structures store proteins to be released by the serous acinar cells | zymogen granules |
| this gland releases almost entirely serous saliva | parotid gland |
| this gland releases a mixed serous/mucous saliva | submandibular gland |
| this gland releases a mixed serous/mucous saliva, but has a much higher mucous content than the other salivary glands. | sublingual gland |
| what is the function of saliva | it moistens oral mucosa and food to help swallowing. it begins the enzymatic digestion of carbohydrates. it also helps control bacterial populartion growth (lysozymes). |
| name the structures of the portal triad of the liver | portal vein, hepatic artery, bile duct. |
| describe the classic lobule for the liver structure model | central vein in the middle with portal triads surrounding a hexagonal shape. This model is seen more in animals. |
| describe the portal triangle model for the liver | portal triad at the center with central veins at the corners of the triangle. this describes the glandular effect. |
| describe the liver acinus model | a cross with two portal triads on the short axis and two central veins on the long axis. it is useful for explaining metabolism and pathology. |
| in the liver acinus model, which hepatocytes receive the best oxygenated blood? | hepatocytes closest to the portal triad in the center receive the best oxygenated blood. hepatocytes closest to the central vein in zone three receive the least oxygenated blood. |
| these are cells of the liver that phagocytocize foreign matter. if the spleen is removed, these cells will start removing damaged erythrocytes. | kupfer cells |
| what kind of epithelium is found in the gall bladder? | simple columnar epithelium with microvilli. |
| these are specialized cells in the pancreas that synthesize endocrine hormones that regulate metabolism. this is the endocrine portion of the pancreas. | islets of langerhans. |
| these cells in the pancreas secrete glucagon. | A cells. they ar elocated in the periphery of the islets. |
| these cells in the pancreas secrete insulin. | B cells. they are located in the center of the islets of langerhans. |
| these cells in the pancreas secrete somatostatin, which regulate the release of other pancreatic hormones. | D cells |
| these cells of the pancreas add bicarbonate and water to the exocrine secretion of hte pancreas to neutralize acids from the stomach and prevent premature activation of pancreatic enzymes. | centroacinar cells. |
Created by:
aferdo01
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