This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': "The electrical potential difference necessary for a single ion to be at equilibrium across a membrane is best described by the \nSelect and explain. \nA. Goldman equation, B. van't Hoff equation, C. Fick's law, D. Nernst equation", 'role': 'user'}, {'content': 'Answer: D \nExplanation: At normal body temperature (37degC), the electrical difference that will balance a given concentration difference of univalent ions--such as Na+ ions--can be determined from the following formula, called the Nernst equation.Ref: Guyton; 13th edition; Chapter 4 Transpo of Substances Through Cell Membranes', 'role': 'assistant'}]