GI hormone regulation, motility mechanisms, and digestive and absorptive processes tested on USMLE Step 1.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- Where are gastrin-secreting G cells located?
Show answer
Antrum of the stomach- What is the primary action of gastrin?
Show answer
Stimulates parietal cells to secrete HCl (gastric acid)- What stimulates gastrin secretion?
Show answer
Vagal stimulation, stomach distention, and luminal peptides/amino acids- Where are CCK-secreting I cells located?
Show answer
Duodenum and jejunum- What effect does CCK have on the gallbladder?
Show answer
Stimulates gallbladder contraction- What effect does CCK have on the pancreas?
Show answer
Stimulates secretion of pancreatic digestive enzymes- What stimulates CCK secretion?
Show answer
Fatty acids and amino acids in the duodenum- Where are secretin-secreting S cells located?
Show answer
Duodenum- What effect does secretin have on the pancreas?
Show answer
Stimulates secretion of bicarbonate-rich fluid from pancreatic ducts- What effect does secretin have on gastric acid secretion?
Show answer
Inhibits it- What stimulates secretin secretion?
Show answer
Acid (low pH) in the duodenum- What is the main effect of GIP (glucose-dependent insulinotropic peptide)?
Show answer
Stimulates insulin release from the pancreas- What is the main function of motilin?
Show answer
Stimulates migrating motor complexes during fasting- What is the main function of somatostatin in the GI tract?
Show answer
Inhibits secretion of gastric acid and virtually all other GI hormones- What is the main action of vasoactive intestinal peptide (VIP)?
Show answer
Relaxes GI smooth muscle and sphincters, and stimulates intestinal secretion
FlashKeepers