What is the role of insulin in the body?

Insulin plays a crucial role in regulating blood glucose levels in the body. When blood glucose levels rise after eating, the pancreas secretes insulin. Insulin facilitates the uptake of glucose by cells, particularly muscle and fat cells, allowing them to use glucose for energy or store it for future use. This process effectively lowers the concentration of glucose in the bloodstream.

The action of insulin not only helps maintain stable blood glucose levels but also supports overall metabolic health. By ensuring that glucose is utilized efficiently, insulin prevents hyperglycemia (high blood sugar), which can lead to various health issues if left uncontrolled.

Other options focus on different aspects of metabolism or energy production but do not accurately capture insulin's primary function in blood glucose regulation. Thus, the correct choice highlights insulin's essential role in lowering blood glucose levels.