Diabetes: Cellular functions and level

There is a 41-year-old male patient who presents to the emergency room complaining of frequent urination, increased hunger, “always being thirsty,” and fatigue. He is diagnosed with type 2 diabetes mellitus. Provide at least 2 resources. Present in APA format

1. In explaining to him the physiological reason for his symptoms, what cellular functions do you think would help him understand his disease?
2. How might you explain his fatigue on a cellular level?