MICROANATOMY

Detailed explanation-1: -Insulin is secreted by the -cells of the pancreatic islets of Langerhans in response to elevation of the intracellular Ca2+ concentration ([Ca2+]i).

Detailed explanation-2: -While the beta cell produces insulin, the only blood glucose-lowering hormone of the body, the alpha cell releases glucagon, which elevates blood glucose.

Detailed explanation-3: -Beta cells (-cells) are a type of cell found in pancreatic islets that synthesize and secrete insulin and amylin.

Detailed explanation-4: -The beta-cell is one of four major types of cells present in the islets of Langerhans, which are islands of cells distributed throughout the endocrine pancreas in most mammals.