HomeCoursesMEDSCI 201: Human Structure and FunctionLecture 24 Lecture 24 0% Question 1 of 44 What epithelial cells predominate in villi of the small intestine? (2)= Simple columnar enterocytes, goblet cells What epithelial cells predominate in villi of the small intestine? (2)= Simple columnar enterocytes, goblet cells Question 1 of 44Question 2 of 44 Which of the villus cells has the microvilli brush border?= Simple columnar enterocytes Which of the villus cells has the microvilli brush border?= Simple columnar enterocytes Question 2 of 44Question 3 of 44 What cells predominate the crypts?= Blood vessles, lacteal, smooth muscle, lyphocytes, fibroblasts What cells predominate the crypts?= Blood vessles, lacteal, smooth muscle, lyphocytes, fibroblasts Question 3 of 44Question 4 of 44 What helps move/mix the contents of the intestinal lumen besides peristalsis?= Muscularis mucosae contracts > moves villus > cytoskeleton of villus moves microvillus brush border What helps move/mix the contents of the intestinal lumen besides peristalsis?= Muscularis mucosae contracts > moves villus > cytoskeleton of villus moves microvillus brush border Question 4 of 44Question 5 of 44 What are the secretions of enteroendocrine cells? (4)= Cholecystokinin, secreten, somatostatins, seretonin What are the secretions of enteroendocrine cells? (4)= Cholecystokinin, secreten, somatostatins, seretonin Question 5 of 44Question 6 of 44 What stimulates enteroendocrine cells to secrete?= Acidic chyme, amino acid and fatty acid fragments What stimulates enteroendocrine cells to secrete?= Acidic chyme, amino acid and fatty acid fragments Question 6 of 44Question 7 of 44 What does cholecystokinin do? (2)= Stimulates release of bile, stimulates pancreas to release enzymes What does cholecystokinin do? (2)= Stimulates release of bile, stimulates pancreas to release enzymes Question 7 of 44Question 8 of 44 What does scretin do?= Stimulates ductal cells of bile and pancreatic ducts to release HCO3- What does scretin do?= Stimulates ductal cells of bile and pancreatic ducts to release HCO3- Question 8 of 44Question 9 of 44 What does somatostatin do?= Provides negative feedback for gastrin and hormones What does somatostatin do?= Provides negative feedback for gastrin and hormones Question 9 of 44Question 10 of 44 What does seretonin do?= Stimulates smooth muscle contraction What does seretonin do?= Stimulates smooth muscle contraction Question 10 of 44Question 11 of 44 Where are the paneth cells located?= Base of gland Where are the paneth cells located?= Base of gland Question 11 of 44Question 12 of 44 What do the enterodendocrine cells of the duodenum secrete? (2)= Cholecystokinin, secretin What do the enterodendocrine cells of the duodenum secrete? (2)= Cholecystokinin, secretin Question 12 of 44Question 13 of 44 What is the pH of chyme coming into the duodenum? = pH 2 What is the pH of chyme coming into the duodenum? = pH 2 Question 13 of 44Question 14 of 44 What protects the cells of the duodenum from the acid of the chyme?= Brunner's glands > HCO3- rich mucous pH 7 What protects the cells of the duodenum from the acid of the chyme?= Brunner's glands > HCO3- rich mucous pH 7 Question 14 of 44Question 15 of 44 What happens to the quantity of Brunner's glands from the duodenum to the ileum?= Decreases What happens to the quantity of Brunner's glands from the duodenum to the ileum?= Decreases Question 15 of 44Question 16 of 44 Why are pancreatic secretions inactive until they reach the duodenum?= pH increases in the duodenum Why are pancreatic secretions inactive until they reach the duodenum?= pH increases in the duodenum Question 16 of 44Question 17 of 44 What is the function of the Jejunum?= Extra digestion and absorption What is the function of the Jejunum?= Extra digestion and absorption Question 17 of 44Question 18 of 44 How does the jejunum increase digestion and absorption?= Increase in plicae and villi How does the jejunum increase digestion and absorption?= Increase in plicae and villi Question 18 of 44Question 19 of 44 What is the primary function of the ileum?= A defense against infection What is the primary function of the ileum?= A defense against infection Question 19 of 44Question 20 of 44 What is a feature of the ileum?= Payer's patches What is a feature of the ileum?= Payer's patches Question 20 of 44Question 21 of 44 What are Payer's patches?= Macroscopic lymphatic aggregates What are Payer's patches?= Macroscopic lymphatic aggregates Question 21 of 44Question 22 of 44 What is the function of the large intestine?= Absorption of H2O What is the function of the large intestine?= Absorption of H2O Question 22 of 44Question 23 of 44 What are teniae coli?= Bands of muscle outside colon What are teniae coli?= Bands of muscle outside colon Question 23 of 44Question 24 of 44 Which part of the colon is attached to the fatty apron?= Transverse Which part of the colon is attached to the fatty apron?= Transverse Question 24 of 44Question 25 of 44 Describe the large intestinal tract sections? (7)= Caecum, appendix, ascending colon, transverse colon, descending colon, sigmoidal colon, rectum, anus Describe the large intestinal tract sections? (7)= Caecum, appendix, ascending colon, transverse colon, descending colon, sigmoidal colon, rectum, anus Question 25 of 44Question 26 of 44 What does the large intestine NOT have that the small intestine does? (2)= Plicae, villi What does the large intestine NOT have that the small intestine does? (2)= Plicae, villi Question 26 of 44Question 27 of 44 What does the large intestine have in common with the small intestine?= Mucosal glands (crypts of lieberkuhn) What does the large intestine have in common with the small intestine?= Mucosal glands (crypts of lieberkuhn) Question 27 of 44Question 28 of 44 What cells in the large intestine predominate?= Columnar absorptive, goblet cells What cells in the large intestine predominate?= Columnar absorptive, goblet cells Question 28 of 44Question 29 of 44 What do the columnar absorptive cells absorb? (3)= H2O, electrolytes, vitamins What do the columnar absorptive cells absorb? (3)= H2O, electrolytes, vitamins Question 29 of 44Question 30 of 44 How does the amount of goblet cells change over the course of the colon?= Increases toward rectum How does the amount of goblet cells change over the course of the colon?= Increases toward rectum Question 30 of 44Question 31 of 44 What is a feature of the large intestinal lamina propria?= Gut/mucosa associated lyphatic tissue (GALT/MALT) What is a feature of the large intestinal lamina propria?= Gut/mucosa associated lyphatic tissue (GALT/MALT) Question 31 of 44Question 32 of 44 What facilitates the formation of haustia coli?= Teniae coli What facilitates the formation of haustia coli?= Teniae coli Question 32 of 44Question 33 of 44 What are the epithelial cells of the anus?= Stratified squamous What are the epithelial cells of the anus?= Stratified squamous Question 33 of 44Question 34 of 44 What is the pattern for cell replacement in the GI? = Surface: days , Deep: weeks/months What is the pattern for cell replacement in the GI? = Surface: days , Deep: weeks/months Question 34 of 44Question 35 of 44 What exists between liver lobules?= Connective tissue septa What exists between liver lobules?= Connective tissue septa Question 35 of 44Question 36 of 44 Where are the portal triads found?= Corners of lobules Where are the portal triads found?= Corners of lobules Question 36 of 44Question 37 of 44 How much blood comes to the liver through the gut portal vein?= 75% How much blood comes to the liver through the gut portal vein?= 75% Question 37 of 44Question 38 of 44 Where does blood go from the portal vein and hepatic arteries? = Central vein Where does blood go from the portal vein and hepatic arteries? = Central vein Question 38 of 44Question 39 of 44 What is unique about sinusoidal capillaries?= Greater than 1 RBC thick What is unique about sinusoidal capillaries?= Greater than 1 RBC thick Question 39 of 44Question 40 of 44 What is charactersitic of sinusoidal epithelium?= Very leaky What is charactersitic of sinusoidal epithelium?= Very leaky Question 40 of 44Question 41 of 44 What are hepatic macrophages called?= Kupffer cells What are hepatic macrophages called?= Kupffer cells Question 41 of 44Question 42 of 44 Where do bile cannaliculi run?= Outside hepatocytes, perpendicular to blood/sinusoidal flow Where do bile cannaliculi run?= Outside hepatocytes, perpendicular to blood/sinusoidal flow Question 42 of 44Question 43 of 44 What is a liver acinus?= Functional zone where blood flows to central vein What is a liver acinus?= Functional zone where blood flows to central vein Question 43 of 44Question 44 of 44 What is the portal lobule?= Functional zone where bile flows to bile duct What is the portal lobule?= Functional zone where bile flows to bile duct Question 44 of 44 Loading...
