What is the overall effect of insulin signaling on blood glucose levels after a high-glucose meal?

• A. Insulin signaling has no effect on blood glucose levels.
• B. Insulin signaling increases blood glucose levels by inhibiting glucose uptake.
• C. Insulin signaling increases blood glucose levels by promoting glucose release from cells.
• D. Insulin signaling decreases blood glucose levels by enhancing glucose uptake into cells.

Answer: (D)