Posted: July 24th, 2017

A 25-year-old woman has a 3-day history of vomiting and diarrhea. She has postural hypotension and poor tissue turgor. Her serum sodium concentration is 130 mEq/L. Which of the following findings is most likely?

A 25-year-old woman has a 3-day history of
vomiting and diarrhea. She has postural
hypotension and poor tissue turgor. Her serum
sodium concentration is 130 mEq/L. Which of
the following findings is most likely?
(A) Decreased serum aldosterone
concentration
(B) Increased serum atrial natriuretic
peptide concentration
(C) Increased effective circulating volume
(D) Increased serum ADH (vasopressin)
concentration
(E) Urine osmolality less than serum
osmolality