Multiple Choice
Renal physiologists are studying how hydration status affects the mechanisms of urine concentration and dilution in humans. To do this, they developed a technique in experimental animals that permits sampling of tubular fluid in different parts of the nephron. A tubular fluid sample with an osmolarity of 110 mOsm/L is obtained from a healthy animal after 12 hours of water deprivation. Assuming the physiology of this animal mirrors human physiology, which of the following sites along the nephron was most likely sampled? 
A) A
B) B
C) C
D) D
E) E
Correct Answer:

Verified
Correct Answer:
Verified
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