QuestionSBA
QuestionChoice
This is the correct answer. Gastrin is a hormone released by G cells in the pyloric antrum of the stomach, duodenum and pancreas that stimulates the secretion of gastric acid by parietal cells. Cholecystokinin, secreted by I cells in the duodenum, is responsible for stimulating the digestion of fat and protein. Secretin,  which plays a role in regulating fluid balance, is secreted by S cells of the duodenum. Somatostatin has a range of neuroendocrine effects, and is released by D cells in the stomach and pancreas.
10008235
a
Gastrin – G cells; Cholecystokinin (CCK) – I cells; Secretin – S cells; Somatostatin – D cells; gastric acid – parietal cells
QuestionChoice
This answer is not correct as somatostatin is secreted by D cells in the stomach and pancreas.
10008236
b
Gastrin – G cells; Cholecystokinin (CCK) – I cells; Secretin – S cells; Somatostatin – S cells; gastric acid – parietal cells
QuestionChoice
This answer is not correct as glucagon is mainly produced by alpha cells of the pancreas. G cells secrete gastrin.
10008239
e
Glucagon – G cells; Cholecystokinin (CCK) – I cells; Secretin – S cells; Somatostatin – D cells; gastric acid – parietal cells
QuestionChoice
This answer is not correct as amylase is mainly produced by the salivary cells and the pancreas. G cells secrete gastrin.
10008238
d
Amylase – G cells; Cholecystokinin (CCK) – I cells; Secretin – S cells; Somatostatin – D cells; gastric acid – parietal cells
QuestionChoice
This answer is not correct as gastrin is secreted by G cells and gastric acid is secreted by parietal cells.
10008237
c
Gastrin – endocrine cells; Cholecystokinin (CCK) – I cells; Secretin – S cells; Somatostatin – D cells; gastric acid – chief cells
Concept
Chapter
2693
3776
Gastric Secretion
Topic
149
Gastro-intestinal physiology
14194
A 49-year-old man visits his GP with a 6 month history of stomach pain and acid reflux.

Which of the following pairing of gastric secretions and their cells of origin is correct?
a