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': 'If transport through a cell membrane requires the expenditure of energy, it is called \nSelect and explain. \nA. facilitated diffusion, B. active transport, C. simple diffusion, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Active transport requires expenditure of energy to move molecules through a membrane.', 'role': 'assistant'}]