What causes type 1 diabetes? Type 1 diabetes occurs when your immune system, the body's system for fighting infection, attacks and destroys the insulin-producing beta cells of the pancreas. Scientists think type 1 diabetes is caused by genes and environmental factors, such as viruses, that might trigger the
False because if she rarly exercises than she would not be burning the extra calories she gained and there fore would be gaining an unhealthy amount of weight.