American Board of Pathology (ABPath) Practice Test

The correct answer, which indicates the cell type that is not found in the Islet of Langerhans, is gamma.

In the pancreas, the Islets of Langerhans contain several types of cells, each responsible for producing different hormones that regulate blood sugar levels and other metabolic functions. The primary cell types include:

- Alpha cells, which secrete glucagon, a hormone that increases blood glucose levels by stimulating the liver to release glucose.

- Beta cells, which secrete insulin, a hormone that lowers blood glucose levels by facilitating cellular uptake of glucose.

- Delta cells, which produce somatostatin, a hormone that regulates the endocrine system and inhibits the release of both glucagon and insulin.

While there are minor cell types present in the islets, the presence of a gamma cell type is not recognized in the context of the Islet of Langerhans, making it the correct choice for the question posed.