This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'In which pa of Henle loop is tubular fluid hypotonic with plasma/GFR? \nSelect and explain. \nA. Thin descending limb, B. Thin ascending segment/limb., C. Thick ascending segment/limb., D. Thick descending segment/limb.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thick ascending segment/limb.REABSORPTION IN THICK ASCENDING LIMB:Water reabsorption:Totally impermeable to water.Ascending segment also referred "Diluting" segment:Due to sodium & solute absorption without water.Resulting in tubular fluid dilution.Hence, Tubular fluid is hypotonic.Sodium, Potassium & Chloride reabsorption:By "Secondary active transpo" Through Na2+-K+-2Cl-- carrier transpoer.Transpos one Na2+, one K+, & two Cl-.Active sodium absorption occurs.30% filtered Na2+ reabsorbed.', 'role': 'assistant'}]