Biology 202: Accessory Organs of the Gastrointestinal System 1) Label the image below. Peritoneum Small intestine Liver Stomach Transverse colon Fluid in peritoneal cavity Peritoneal cavity Source Lesson: The Peritoneum & Mesentery: Structures & Comparison 2) Label the diagram below. Ascending colon Liver Appendix Cecum Anus Gallbladder Ileum Sigmoid flexure Duodenum Pancreas Transverse colon Right hepatic flexure Left splenic flexure Rectum Descending colon Stomach Jejunum Sigmoid colon Source Lesson: The Gall Bladder: Function & Usage 3) Label the image below. Bladder Stomach Spleen Liver Gall bladder Colon Small intestine Appendix Source Lesson: The Liver: Structure, Role, Regulatory Processes & Pathology 4) Label the diagram below. Portal arteriole Central vein Connective tissue Bile duct Central vein Lobules Sinusoids From portal vein Interlobular vein Portal venule Plates of hepatocytes Source Lesson: The Liver: Structure, Role, Regulatory Processes & Pathology 5) Label the diagram below. Beta cell Pancreatic islets Pancreas Common bile duct Main pancreatic duct Duodenum Accessory pancreatic duct Delta cell Insulin in capillary Blood vessels Exocrine pancreas cells Alpha cell Source Lesson: The Pancreas: Structure, Role & Pathology 6) Label the structures of the acinar cell of the pancreas. Golgi apparatus Microvilli Basal membrane Mitochondria Secretory granules Granular endoplasmic reticulum Nucleus Ribosomes Source Lesson: The Pancreas: Structure, Role & Pathology 7) Fill in the table below with the correct hormone. Ghrelin Gastrin Secretin Cholecystokinin GI Hormone Origin Target Actions 1) Gastrin G cells in the fundic Stimulates HCL production by parietal cells; Stimulate enzyme gland region of the secretion by chief cells; Induces pancreatic secretions and stomach gallbladder contraction 2) Cholecystokinin Enteroendocrine Stimulates release of pancreatic enzymes (trypsin, lipases, (CCK) cells in the nucleases, and other proteases) into the duodenum; Stimulates duodenum contraction of the gallbladder and release of bile into the duodenum. Bile helps to emulsify fats and prepare them for digestion by pancreatic lipases; May act as a hunger suppressant. 3) Secretin Produced by S cells Maintains water homeostasis; Regulates fluid environment of the in the duodenum duodenum by influencing secretions draining into this region from the stomach, liver, and pancreas; Regulates duodenal pH by inhibiting gastric acid (HCL) secretion and promoting bicarbonate ion release from centroacinar cells in the pancreas; Stimulates bile production by the liver. 4) Ghrelin Enteroendocrine Stimulates food intake so consider the 'hunger' hormone; Increases cells in the stomach gastric motility and gastric acid secretion; Acts on the anterior and less so the pituitary gland, hypothalamic arcuate nucleus, and neuropeptide Y duodenum region neurons to stimulate appetite; Regulates reward centers in the brain; Regulates learning and memory; Involved in sleep-wake cycle; Regulates taste sensation; Regulates glucose metabolism. Source Lesson: Hormones Involved in Gastrointestinal Processes .