This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Calcium Metabolism, Subject name: Physiology
[{'content': 'Bile acid uptake by hepatocytes is dependent on: \nSelect and explain. \nA. Calcium, B. Iron, C. Sodium, D. Potassium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. SodiumThe uptake of bile acid by hepatocytes is sodium-dependent and is not dependent on calcium, iron, potassium, or chloride.', 'role': 'assistant'}]