Which statement best describes insulin's role in glucose metabolism?

Which statement best describes insulin's role in glucose metabolism?

• A. It triggers glucose export from cells
• B. It facilitates the uptake of glucose into cells for energy
• C. It inhibits glucose uptake
• D. It converts glucose into glycogen immediately

Answer: (B)

Insulin’s primary role in glucose handling is to move glucose from the bloodstream into cells so it can be used for energy or stored. In muscle and adipose tissue, insulin signals the translocation of GLUT4 transporters to the cell surface, increasing glucose uptake right when blood glucose is high. Once inside the cells, glucose can be burned for energy or channeled into storage pathways like glycogen synthesis. In the liver, insulin promotes conversion of glucose to glycogen and supports glycolysis, while also helping curb glucose production. So the statement that best describes insulin’s role is that it facilitates the uptake of glucose into cells for energy (and storage). The other options misstate its action: insulin does not cause glucose to be exported from cells, it does not inhibit uptake, and although it promotes glycogen formation, calling it an immediate conversion of glucose to glycogen oversimplifies and misframes its rapid uptake and utilization role.

Insulin’s primary role in glucose handling is to move glucose from the bloodstream into cells so it can be used for energy or stored. In muscle and adipose tissue, insulin signals the translocation of GLUT4 transporters to the cell surface, increasing glucose uptake right when blood glucose is high. Once inside the cells, glucose can be burned for energy or channeled into storage pathways like glycogen synthesis. In the liver, insulin promotes conversion of glucose to glycogen and supports glycolysis, while also helping curb glucose production. So the statement that best describes insulin’s role is that it facilitates the uptake of glucose into cells for energy (and storage). The other options misstate its action: insulin does not cause glucose to be exported from cells, it does not inhibit uptake, and although it promotes glycogen formation, calling it an immediate conversion of glucose to glycogen oversimplifies and misframes its rapid uptake and utilization role.