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': 'WE - are absorbed in the DCT: \nSelect and explain. \nA. Water, B. Potassium, C. Potassium, D. Sodium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. PotassiumPotassium once filtered in the tubular fluid is reabsorbed only in the proximal tubules. Nowhere else it is reabsorbed so it is not reabsorbed in the DCT, rather it is secreted into the tubular fluid in DCTQ.Water reabsorption in DCTEarly pa of distal tubule is impermeable to water.Late DCT becomes permeable under the influence of ADH.', 'role': 'assistant'}]