Final answer:
The pancreas is the gland responsible for producing insulin, a hormone central to regulating blood glucose levels.
Step-by-step explanation:
The gland producing the hormone insulin to control the blood sugar is the pancreas. The pancreas is an essential organ for regulating blood glucose levels through the secretion of hormones, including insulin and glucagon. The endocrine cells of the pancreas are organized into clusters known as pancreatic islets or the islets of Langerhans. Within these islets, the beta cells are responsible for producing insulin, which lowers blood glucose levels by facilitating the uptake of glucose by the body's cells, especially after carbohydrate intake.
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