text: A ring of this organ's tissue constricts a nearby structure in a rare "annular" condition.
full_question: A ring of this organ's tissue constricts a nearby structure in a rare "annular" condition. A form of amyloidosis known as IAPP is frequently seen in diseased forms of this organ. The Golgi apparati of many cells in this organ contain C-peptide, which converts a protein made here to its active form. The centroacinar cells and intercalated ducts in this organ respond to the hormone secretin, enabling this structure to release bicarbonate. This organ's duct joins the common (*) bile duct just prior to the Ampulla of Vater. Like the salivary glands, this organ makes amylase. Cells in this organ are destroyed in type 1 diabetes. For 10 points, name this digestive organ whose beta cells in the islets of Langerhans produce insulin.
first_sentence: A ring of this organ's tissue constricts a nearby structure in a rare "annular" condition.
raw_answer: pancreas