Which hormone is responsible for bringing insulin out of storage?

Glucagon is the hormone that plays a critical role in regulating blood glucose levels by promoting the release of insulin from storage in the pancreas. This process is particularly essential when blood glucose levels are low, signaling the body’s need for increased glucose availability. Glucagon works by binding to specific receptors on pancreatic alpha cells, stimulating the conversion of stored glycogen to glucose, and facilitating the release of insulin into the bloodstream to help manage glucose levels effectively.

Adrenaline primarily prepares the body for 'fight or flight' responses, increasing blood sugar for immediate energy needs, but it does not directly facilitate the storage or release of insulin in the same manner as glucagon. Cortisol, a stress hormone, affects metabolism and insulin sensitivity but does not specifically act to release insulin from storage. Thyroxine, a hormone produced by the thyroid gland, regulates metabolism but does not have a direct role in insulin release. Hence, glucagon is the most accurate choice for this question.