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  4. Hormone glucagon is secreted bycells of islets of Langerhans

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Q. Hormone glucagon is secreted by_____cells of islets of Langerhans

UP CPMTUP CPMT 2014

Solution:

The pancreas lies inferior to the stomach in a bend of the duodenum. It is both an exocrine and an endocrine gland. Pancreas has groups of cells called islets of Langerhans. These produce endocrine secretions. Four kinds of cells have been identified in the islets :
- Alpha cells (about $15 \%$ ) produce glucagon.
- Beta cells (about $65 \%$ ) produce insulin.
- Delta cells or $D$-cells (about $5 \%$ ) produce somatostatin $(S S)$.
- Pancreatic polypeptide cells or $P P$ cells or $F$ cells $(15 \%)$, produce pancreatic polypeptide $(P P)$.