Adrenaline Raises Blood Glucose Levels

Steps:

• Identify hormones that regulate blood glucose: insulin lowers it, while counter-regulatory hormones like adrenaline raise it.
• Evaluate option D: adrenaline, released during stress, triggers glycogen breakdown in the liver.
• Eliminate A: reduced food intake decreases glucose supply.
• Eliminate B: excess insulin facilitates glucose uptake by cells.
• Eliminate C: fewer red blood cells affect oxygen delivery, not glucose levels.

Why D is correct:

• Adrenaline binds to receptors on liver cells, activating glycogenolysis (breakdown of glycogen to glucose) and gluconeogenesis (new glucose production), directly increasing blood glucose concentration.

Why the others are wrong:

• A: Extreme food reduction starves the body of glucose, lowering blood levels.
• B: Too much insulin signals cells to absorb glucose, reducing blood concentration.
• C: Anemia impairs oxygen transport but has no direct impact on glucose regulation.

Final answer: D