Which of the following is NOT a role of glucagon?

Glucagon is a hormone produced by the alpha cells of the pancreas, primarily tasked with raising blood glucose levels when they fall too low. Its primary roles include stimulating glycogenolysis, which is the conversion of glycogen stored in the liver into glucose (this supports the body in times of fasting or low carbohydrate intake). Additionally, glucagon promotes gluconeogenesis, which is the synthesis of glucose from non-carbohydrate sources, further contributing to the elevation of blood glucose levels.

When glucagon is released, it signals the liver to release glucose into the bloodstream. This is crucial during periods when immediate energy is required, such as between meals or during physical activity.

The statement regarding reducing sugar cravings does not align with the physiological functions of glucagon. In fact, cravings for sugar are more often associated with insulin, which helps regulate glucose levels and can lead to feelings of hunger when blood sugar levels drop. Glucagon's role is not to manage sugar cravings but rather to ensure adequate energy supply by elevating blood sugar levels. Therefore, recognizing glucagon's primary functions clarifies why it does not play a role in reducing sugar cravings.