Podcast
Questions and Answers
What hormone inhibits the production of acid in parietal cells by reducing cAMP concentrations?
What hormone inhibits the production of acid in parietal cells by reducing cAMP concentrations?
- Gastrin
- Histamine
- Acetylcholine
- Somatostatin (correct)
Which cells are the most potent regulators of parietal cell secretions?
Which cells are the most potent regulators of parietal cell secretions?
- ECL cells (correct)
- G cells
- Chief cells
- Somatostatin-secreting cells
What is the primary cause of most ulcers, specifically 90% in the duodenum and 70% in the stomach?
What is the primary cause of most ulcers, specifically 90% in the duodenum and 70% in the stomach?
- Overstimulation of chief cells
- Parietal cell hyperactivity
- Excessive acid production
- Helicobacter pylori infection (correct)
Which of the following drugs inhibits the production of acid by parietal cells?
Which of the following drugs inhibits the production of acid by parietal cells?
Pepsinogen, released from chief cells, requires what condition to be converted into the active enzyme pepsin?
Pepsinogen, released from chief cells, requires what condition to be converted into the active enzyme pepsin?
Which hormone, when acting together with histamine and gastrin, leads to increased acid releasing rate in parietal cells?
Which hormone, when acting together with histamine and gastrin, leads to increased acid releasing rate in parietal cells?
What stimulates the release of acetylcholine to activate parietal cells in the stomach?
What stimulates the release of acetylcholine to activate parietal cells in the stomach?
Which hormone stimulates the parietal cells to produce hydrochloric acid in the stomach?
Which hormone stimulates the parietal cells to produce hydrochloric acid in the stomach?
What is the role of G cells in the gastric phase of digestion?
What is the role of G cells in the gastric phase of digestion?
How is salivary secretion regulated?
How is salivary secretion regulated?
Which cells are stimulated by gastrin to produce hydrochloric acid in the stomach?
Which cells are stimulated by gastrin to produce hydrochloric acid in the stomach?
What is the pancreatic response to the gastric phase similar to?
What is the pancreatic response to the gastric phase similar to?
What hormone is released from S cells in response to highly acidic chyme entering the duodenum?
What hormone is released from S cells in response to highly acidic chyme entering the duodenum?
Which hormone enhances acid secretion by parietal cells in response to distension of the duodenum?
Which hormone enhances acid secretion by parietal cells in response to distension of the duodenum?
What hormone is responsible for inhibiting gastrin release by G cells during the intestinal phase?
What hormone is responsible for inhibiting gastrin release by G cells during the intestinal phase?
In the intestinal phase, what stimulates the release of gastrin and enterooxyntin from mechanoreceptors in the duodenum?
In the intestinal phase, what stimulates the release of gastrin and enterooxyntin from mechanoreceptors in the duodenum?
Which cells release secretin in response to excess hydrogen ions in the duodenal lumen?
Which cells release secretin in response to excess hydrogen ions in the duodenal lumen?
What regulates salivary secretions during the intestinal phase?
What regulates salivary secretions during the intestinal phase?
Which hormone is responsible for stimulating gastrin release from G cells during the cephalic phase of digestion?
Which hormone is responsible for stimulating gastrin release from G cells during the cephalic phase of digestion?
What is the primary function of gastrin during the cephalic phase of digestion?
What is the primary function of gastrin during the cephalic phase of digestion?
What is the primary role of the vagus nerve during the cephalic phase of digestion?
What is the primary role of the vagus nerve during the cephalic phase of digestion?
What is the primary purpose of the low-affinity binding of gastrin to the CCK-1/CCK-alpha receptor on pancreatic acinar cells during the cephalic phase?
What is the primary purpose of the low-affinity binding of gastrin to the CCK-1/CCK-alpha receptor on pancreatic acinar cells during the cephalic phase?
Which hormone is primarily responsible for stimulating pancreatic secretions during the cephalic phase of digestion?
Which hormone is primarily responsible for stimulating pancreatic secretions during the cephalic phase of digestion?
What is the primary function of the gastrin released during the cephalic phase of digestion?
What is the primary function of the gastrin released during the cephalic phase of digestion?
What is the name of the process where bile acids are actively absorbed in the ileum and returned to the liver?
What is the name of the process where bile acids are actively absorbed in the ileum and returned to the liver?
Which phase of digestion occurs before the food enters the stomach and involves thinking about food or smelling food?
Which phase of digestion occurs before the food enters the stomach and involves thinking about food or smelling food?
Which hormone is responsible for stimulating chemo- and mechanoreceptors in the mucosa of the duodenum during the intestinal phase of digestion?
Which hormone is responsible for stimulating chemo- and mechanoreceptors in the mucosa of the duodenum during the intestinal phase of digestion?
During which phase does food enter the duodenum and activate chemo- and mechanoreceptors in the mucosa?
During which phase does food enter the duodenum and activate chemo- and mechanoreceptors in the mucosa?
What is the primary cause of most ulcers, particularly 90% in the duodenum and 70% in the stomach?
What is the primary cause of most ulcers, particularly 90% in the duodenum and 70% in the stomach?
Which hormone enhances acid secretion by parietal cells in response to distension of the duodenum?
Which hormone enhances acid secretion by parietal cells in response to distension of the duodenum?
Which hormone is released during the intestinal phase to inhibit gastric acid secretion?
Which hormone is released during the intestinal phase to inhibit gastric acid secretion?
What is the primary function of secretin during the intestinal phase?
What is the primary function of secretin during the intestinal phase?
Which hormone is released by I cells in the duodenum in response to dietary fats and proteins?
Which hormone is released by I cells in the duodenum in response to dietary fats and proteins?
What is the primary function of gastrin during the intestinal phase?
What is the primary function of gastrin during the intestinal phase?
Which hormone is released by S cells in the duodenum in response to highly acidic chyme?
Which hormone is released by S cells in the duodenum in response to highly acidic chyme?
What is the primary function of cholecystokinin (CCK) during the intestinal phase?
What is the primary function of cholecystokinin (CCK) during the intestinal phase?
