A patient who has been kept NPO (nothing by mouth) for 8 hours before an Intravenous Pyelogram (IVP) complains of intense thirst. Lab values show: serum sodium 155 mEq/L (high), serum osmolarity 300 mOsm/L, and a normal urine specific gravity. What is the most likely physiological conclusion?

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Physics · Biophysics and Physiology

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Antidiuretic Hormone (ADH) levels are physiologically elevated in response to hypernatremia

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