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Physiology

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GIT

Question
6 out of 19
 

Which of the following is correctly matched? (AIIMS NOV 2007)



A Cells- Somatostatin
B D. cells-Insulin

C G cells- Gastrin
D K cells- CCK-PZ

Ans. C G cells- Gastrin

Explanation

  1. B cells secrete insulin, D cells secrete somatostatin, K cells of upper small intestine secrete GIP
  2. Gastrin is a hormone that stimulates secretion of gastric acid by the parietal cells of the stomach. It is released by G cells in the stomach and duodenum.

a. Somatostatin- Delta cells (delta-cells or D cells) are somatostatin producing cells.

  1. They can be found in the stomach, intestine and the Islets of Langerhans in the pancreas.

a. Insulin is synthesized in the pancreas within the beta cells (beta-cells) of the islets of Langerhans.

b. One to three million islets of Langerhans (pancreatic islets) form the endocrine part of the pancreas, which is primarily an exocrine gland. The endocrine portion only accounts for 2% of the total mass of the pancreas. Within the islets of Langerhans, beta cells constitute 60–80% of all the cells.

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