A patient of diabetes mellitus excretes glucose in urine even when he is kept in a carbohydrate free diet. It is because

• fats are catabolised in adipose tissues to form glucose

• amino acids are catabolised in kidney to form glucose

• amino acids are discharged in blood stream from liver

• glycogen from muscles is released in blood stream.

A.

fats are catabolised in adipose tissues to form glucose

A patient of diabetes mellitus is unable to produce or fail to utilize insulin hormone. Thus, he is unable to store glucose in the form of glycogen. Hence, he started to excrete glucose in the urine. A patient is kept in carbohydrate free diet yet he excretes glocose in urine because high level of glucose not only depends on dietary carbohydrates but also on glycogenolysis (degradation of glycogen in liver) and gluconeogenesis (breakdown of fats into glucose in adipose tissues and coversion of muscle lactate into glucose via cori cycle).