Which of the following is a function of insulin?

Insulin plays a crucial role in regulating blood glucose levels by facilitating the movement of glucose into cells, an essential process for maintaining energy balance in the body. When you consume food, especially carbohydrates, glucose levels in the bloodstream increase. Insulin, which is produced by the pancreas, helps cells throughout the body, including muscle and fat cells, absorb glucose from the bloodstream. This not only lowers blood sugar levels but also provides the necessary energy for cellular functions.

In addition to its primary role in glucose uptake, insulin also influences various metabolic processes, including the storage of fat and the synthesis of proteins. Its effects extend beyond just glucose management; however, the core function of helping to move glucose into cells is vital for preventing hyperglycemia and ensuring that cells have the energy they require to function properly.

Other options do not correctly describe the primary functions of insulin. For instance, increasing blood sugar levels contradicts the fundamental role of insulin. Additionally, while insulin does contribute indirectly to carbohydrate metabolism, it does not directly decrease carbohydrate absorption in the digestive tract. Lastly, stimulating appetite is not a primary function of insulin, as it serves more to regulate energy utilization rather than to encourage food intake directly.