brs gastro Flashcards
when parietal cells are stimulated, they secrete
HCl and intrinsic factor
slow waves in small intestinal smooth muscle cells are
oscillating resting membrane potentials
Vibrio cholerae causes diarrhea because it
increases Cl- secretory channels in crypt cells
Cholecystokinin (CCK) has some gastrin-like properties because both CCK and gastrin
have 5 identical C-terminal amino acids
What is transported in intestinal epithelial cells by a Na+ dependent co-transport process?
Alanine
A patient with severe Crohn’s disease has been unresponsive to drug therapy and undergoes ileal resection. After the surgery he will have steatorrhea because
micelles do not form in the intestinal lumen
Cholecystokinin (CCK) inhibits
gastric emptying
What abolishes “receptive relaxation” of the stomach?
Vagotomy
Peristalsis of the small intestine
involves contraction of smooth muscle behind the food bolus and relaxation of smooth muscle in front of the bolus
A patient with Zollinger-Ellison syndrome would be expected to have what changes?
Peptic ulcer disease
Micelle formation is necessary for the intestinal absorption of
vitamin D
What changes occur during defecation?
Internal anal sphincter is relaxed
What is a characteristic of saliva?
Hypotonicity relative to plasma
A patient with a duodenal ulcer is treated successfully with the drug cimetidine. The basis for cimetidine’s inhibition of gastric H+ secretion is that it
blocks H2 receptors on parietal cells
True/False: Regarding the exocrine pancreas, pancreattic enaymem secretion is increased by cholecystokinin
True
