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': 'PCT absorbs all except: September 2008 \nSelect and explain. \nA. Sodium, B. Amino acids, C. Glucose, D. Hydrogen ions', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: Hydrogen ions Normally about 65% of the filtered load of sodium and water, essentially all the filtered glucose and amino acids and a slightly lower percentage of filtered chloride are reabsorbed by the proximal tubule. The proximal tubules also secretes organic acids, bases and hydrogen ions into the tubular lumen.', 'role': 'assistant'}]