HESI A2 Science Practice Exam – Prep, Questions & Study Guide

Insulin is produced in the Islets of Langerhans, which are clusters of cells within the pancreas. Specifically, the beta cells located in these islets are responsible for the synthesis and secretion of insulin, a hormone essential for the regulation of glucose levels in the bloodstream.

The Islets of Langerhans are distinct from other components of the pancreas, which mainly serve different functions. For example, acinar cells are involved in producing digestive enzymes and are part of the exocrine function of the pancreas, while the terms exocrine ducts and pancreatic juice relate to the secretion of these digestive enzymes into the small intestine. In contrast, the role of the Islets of Langerhans is primarily endocrine, dealing with the hormonal regulation of metabolism, thus highlighting the unique role of this part of the pancreas in maintaining blood sugar homeostasis.