Topic:Fred Davis is a 52 - year old overweight male who is complaining of tiredness and blurred vision. He says that for the last two weeks, he's been very hungry and very thirsty, but despite eating...

Topic: Fred Davis is a 52 - year old overweight male who is complaining of tiredness and blurred vision. He says that for the last two weeks, he's been very hungry and very thirsty, but despite eating more, he has lost 8 pounds. He also mentions that he has been urinating more frequently. When asked, he mentions that his paternal grandfather suffered from heart disease and diabetes. Blood tests show blood glucose of 190 mg / dL. Question: Detailed description of condition: (be sure to include organs and organ systems involved, naturally occurring control mechanisms or how the system normally functions, etc.)