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Pancreas consists mainly of large lobules / acini / alveoli and secretes pancreatic juice. In between the acini, randomly spread endocrine cells are present known as Islets of Langerhans which consist of α, β, and F cells & secrete insulin, glucagon, pancreatic polypeptide and somatostatin hormones.

1. Pancreas secretes only insulin.
2. Pancreas secretes insulin and glucagon.
3. Pancreas secretes insulin, glucagon, and somatostatin.
4. Pancreas secretes insulin, glucagon, pancreatic polypeptide, and somatostatin.

Correct answer: Pancreas secretes insulin, glucagon, pancreatic polypeptide, and somatostatin.

Solution

The pancreas has endocrine islets that release multiple hormones, not just insulin or glucagon. α, β, and F cells produce glucagon, insulin, pancreatic polypeptide, and somatostatin, so the most complete option is correct.

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