A) 1
B) 2
C) 3
D) 4
Correct Answer: D
Solution :
Islets of Langerhans was discovered by Paul Langerhans (1869). It is a form of an endocrine part. Each islets of Langerhans contains hundreds of small cells and several blood capillaries and sinusoids. Its cells are distinguished into four types [a] Alpha or A cells constitute about 15% of pancreatic islet cells and secrete glucagon. [b] Beta or B cells constitute about 80% of pancreatic islet cells and secrete insulin. [c] Delta or D cells constitute about 5% of pancreatic islet cells and secrete somatos tatin. [d] F cells constitute the remainder of pancreatic islet cells and secrete pancreatic polypeptide.
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