37. A healthy young man ingests a large volume of distilled water and 50 min later a study is undertaken. In which of thefollowing parts in his kidneys would the liquid with the greatest osmolarity be found?
(A) Proximal tubule
(B) The bottom of the loop of Henle of the cortical nephron
(C) The bottom of the loop of Henle of the juxtamedullary nephron
(D) Distal tubule of the juxtamedullary nephron
(E) The innermost medullary collecting duct