What is the main function of insulin in controlling blood sugar levels?

Insulin mainly signals the liver and muscles to release glucose into the bloodstream during periods of fasting.

Insulin’s main function is to promote glucose entry into cells by enhancing glucose transporter activity at the cell membrane.

Insulin acts as an enzyme that catalyzes the breakdown of glucose molecules into pyruvate within cells.

Insulin primarily increases the absorption of glucose from the intestines into the bloodstream after eating food.