A) 1
B) 2
C) 3
D) 4
Correct Answer: D
Solution :
Islets of Langerhans forms an endocrine part of pancreas. Paul Langerhans (1869) discovered this. Each pancreatic islet includes four types of hormone secreting cells : These are : (i)\[\alpha \] or A cells-constitue about 15% of pancreatic islet cells and secrete glucagon. (ii) \[\text{ }\!\!\beta\!\!\text{ }\]or B cells-constitute about 80% of pancreatic islet cells and secrete insulin. (iii)\[\text{ }\!\!\delta\!\!\text{ }\] or D cells-constitute about 5% of pancreatic islet cells and secrete somatostatin (identical to growth hormone-inhibiting secreted by the hypothalamus). (iv)F cells-constitute the remainder of pancreatic islet cells and secrete pancreatic polypeptide.
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