Which statement about type 1 diabetes pathophysiology is accurate?

• A. Autoimmune insulin resistance due to obesity
• B. Autoimmune destruction of insulin-producing beta cells in pancreas leading to little to no insulin production
• C. Insulin resistance caused by excessive sugar intake
• D. Diabetes with normal insulin production and no need for treatment

Answer: (B)

The main idea here is that type 1 diabetes is driven by an autoimmune attack on the insulin-producing beta cells of the pancreas, causing an absolute deficiency of insulin. In this process, the immune system—often with autoantibodies and autoreactive T cells—destroys beta cells, so insulin production drops to very low or zero levels. Without insulin, glucose cannot enter most cells, leading to hyperglycemia and, without insulin replacement, a risk of diabetic ketoacidosis. This form of diabetes is not caused by obesity or insulin resistance; it typically emerges in younger individuals and is characterized by autoimmune markers against beta-cell components.

That’s why this description fits type 1 diabetes best: autoimmune beta-cell destruction with little to no endogenous insulin production necessitating lifelong insulin therapy. In contrast, the other statements misstate the mechanism (insulin resistance rather than deficiency, or normal insulin production with no treatment) and don’t capture the autoimmune destruction that defines type 1.