<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Hypeonic urine is excreted due to absorption of water in:
Options:
A. Collecting ducts
B. DCT
C. Ascending pa of loop of Henley
D. Descending pa of loop of Henley
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is A: Collecting ducts. Explanation: A i.e. Collecting DuctOsmolality of urine depends on the action of vasopressin on the collecting ductsQ. Alteration in water metabolism by vasopressinUrine isotonic to plasmaGFR (ml/min)% of filteredwaterreabsorbedUrine volume(L/d)Urine concentration(mosm /kg H20)Gain /Loss of water inexcess of solute (L/d)12598.72.4290 Vasopressin present12599.70.51400Q (almost 5 timeof plasma)1.9 gainNo vasopressin (Diabetesinsipidus)12587.123.33020.9 loss<|im_end|>
