A patient suffering from a tumor in the hypothalamus produces excessive amounts of ADH, a condition called syndrome of inappropriate ADH (SIADH) production. For this patient, the excessive ADH...

A patient suffering from a tumor in the hypothalamus produces excessive amounts of ADH, a condition called syndrome of inappropriate
ADH (SIADH) production. For this patient, the excessive ADH production is chronic and has persisted for many months. A student nurse
keeps a fluid intake-output record on the patient. She is surprised to
find that fluid intake and urinary output are normal. What effect was
she expecting? Can you explain why urinary output is normal?