Difference between diabetes mellitus and diabetes insipidus

Explain the main difference between diabetes mellitus and diabetes insipidus? Mention the characteristic signs of diabetes insipidus?

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Diabetes mellitus is a disease caused by deficient insulin secretion by impaired capturing of this hormone by the cells or by the pancreas. Diabetes insipidus is a disease caused by impaired sensitivity of the kidneys to this hormone or also by deficient ADH secretion by the pituitary (hypophysis). In diabetes insipidus the blood lacks ADH and as a result tubular resorption of water in the kidneys is reduced and high volume of urine is produced. The patient urinates lots and many times a day, a sign also accompanied by polydipsia (exaggerated ingestion of water and increased thirst) and sometimes by dehydration.

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