QuestionSBA
QuestionChoice
G cells in the duodenum secrete gastrin in response to amino acids and peptides in the stomach. The gastrin stimulates digestive enzyme secretion by acinar cells. Remember **G** cells as secreting **G**astrin.
10023520
a
G cells secrete gastrin
QuestionChoice
S cells secrete secretin, not cholecystokinin (CCK). Cholecystokinin (CCK) is produced by I cells in the duodenum.
10023524
e
S cells secrete cholecystokinin (CCK)
QuestionChoice
S cells secrete secretin when chyme enters the duodenum and the pH is less than 4.5. Secretin has several roles including stimulating the secretion of bicarbonate-rich pancreatic fluid.
10023521
b
S cells secrete secretin
QuestionChoice
This is incorrect as G cells secrete gastrin, not secretin. Gastrin is produced in response to amino acids and peptides in the stomach. Secretin is produced by S cells.
10023523
d
G cells secrete secretin
QuestionChoice
This is the response to fatty acids, not amino acids and peptides. Cholecystokinin (CCK) causes contraction of the gallbladder and relaxation of the sphincter of Oddi.
10023522
c
I cells secrete cholecystokinin (CCK)
Concept
Chapter
2693
4515
Amino acid and small peptide absorption
Topic
149
Gastro-intestinal physiology
17102
A 38-year-old male with special dietary requirements due to progressive Crohn's disease is on the ward speaking to a dietician. They are wondering how their food gets into their body now that they have had many surgeries on their intestines.

Which cell and corresponding hormone are involved in amino acid and small peptide breakdown?
a