A 51-year-old man is concerned because he has noticed during the past few weeks that he has started to urinate more frequently and is always hungry and thirsty. He is also worried because he has been treated for skin infections on six occasions during the past year. The fasting blood glucose level is measured, and a glucose tolerance test is performed. The results show that the patient has diabetes mellitus. What is the normal fasting blood glucose level? Why does glucose appear in the urine in diabetes mellitus? What is the underlying cause of diabetes mellitus?

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The Answer of A 51-year-old man is concerned because he has noticed during the past few weeks that he has started to urinate more frequently and is always hungry and thirsty. He is also worried because he has been treated for skin infections on six occasions during the past year. The fasting blood glucose level is measured, and a glucose tolerance test is performed. The results show that the patient has diabetes mellitus. What is the normal fasting blood glucose level? Why does glucose appear in the urine in diabetes mellitus? What is the underlying cause of diabetes mellitus?

A 51-Year-Old Man Is Concerned Because He Has Noticed During