Final answer:
Type 1 diabetes is a chronic autoimmune disorder that usually develops in childhood or adolescence. Insulin injections are crucial in managing blood glucose levels.
Step-by-step explanation:
Type 1 diabetes is a chronic autoimmune disorder that develops most often in childhood or adolescence. It occurs when the immune system attacks the insulin-secreting beta cells of the pancreas, resulting in a lack of insulin production. Insulin injections are necessary for individuals with type 1 diabetes to regulate their blood glucose levels.