What effect does insulin have on blood glucose levels?

Insulin plays a crucial role in regulating blood glucose levels by facilitating the uptake of glucose into cells, particularly in muscle and fat tissues. When blood glucose levels rise after eating, the pancreas releases insulin. This hormone signals the cells to absorb glucose, reducing the concentration of glucose in the bloodstream. Additionally, insulin promotes the storage of glucose in the form of glycogen in the liver and muscles and inhibits the production of glucose by the liver.

As a result, the overall effect of insulin is to decrease blood glucose levels, making the provided answer accurate. This regulation of glucose is essential for maintaining homeostasis and provides the body with an efficient way to manage energy sources. The other choices do not reflect the physiological role of insulin in the context of blood glucose management.