What happens to osmolarity in a patient with a lung tumor that secretes vasopressin (adh)?

Decreased osmolarity. Increased osmolality in the blood will stimulate the secretion of antidiuretic hormone (adh), increasing water reabsorption, causing more concentrated urine, and less concentrated blood plasma. So, if you have ADH (vasopressin) secretion, you will have the opposite effect over time -- remember it is in constant change and balance.

Related Questions

What happens to plasma and urine osmolarity with a lung tumor that secretes vasopressin (adh)?

V plasma & ^ Urine. Vasopressin/adh increases the amount of water reabsorbed by the kidneys and decreases the amount of water excreted into the urine. With more water in the bloodstream, the concentration of everything else decreases (so osmolality goes down), while the concentration of everything in the urine goes up (as dose the urine osmolality). Read more...