Which sequence correctly describes insulin’s primary cellular actions after a carbohydrate-rich meal?

• A. Pancreas secretes epinephrine → epinephrine increases membrane transporters in liver only → causes glycogenesis in muscle and lipogenesis in liver to reduce blood glucose.
• B. Pancreas secretes insulin → insulin directly converts glucose to CO2 in the bloodstream → blood glucose falls due to chemical oxidation outside cells.
• C. Pancreas secretes glucagon → glucagon binds receptors on adipose cells → decreases transporter expression → stimulates breakdown of glycogen and lipids, lowering blood glucose.
• D. Pancreas secretes insulin → insulin binds receptors on cells → increases membrane glucose transporter expression → promotes glycogen synthesis in liver and muscle and lipogenesis in adipose tissue, lowering blood glucose.

Answer: (D)