Which type of cell secretes insulin?

The type of cell that secretes insulin is the beta cell. Beta cells are located in the islets of Langerhans within the pancreas. Their primary function is to produce and release insulin, a hormone that plays a critical role in glucose metabolism by facilitating the uptake of glucose into cells, thereby lowering blood sugar levels.

Insulin secretion is crucial for maintaining normal blood glucose levels, especially postprandially (after eating). When blood sugar levels rise, beta cells respond by releasing insulin, which helps cells throughout the body absorb glucose to use as energy or store as fat for future energy needs.

Understanding the specific roles of pancreatic cells is essential for grasping concepts related to diabetes and metabolic disorders, where insulin production or action may be impaired.