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: Unknown
[{'content': 'Nernst potential for K+  ion across the cell membrane is- \nSelect and explain. \nA. + 61mV, B. + 10mV, C. - 90 mV, D. - 94 mV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref:\xa0 Guyton & Hall’s ‘Textbook of Medical Physiology’; 10/e,pg55\nContribution of the Potassium DiffusionPotential:\nWe make the assumption that the only movement of ions through the membrane is diffusion of potassium ions. Because of the high ratio of potassium ions inside to outside, 35 to 1, the Nernst potential corresponding to this ratio is -94 mV because the logarithm of 35 is 1.54 and this times -61 mV is -94 mV. Therefore, if potassium ions were the only factor causing the resting potential, this resting potential inside the fiber would also be equal to -94 mV.\nNow, let us see what Ganong has to say – Ref: Ganong, 23/e, Pg 8, Table 1-1.', 'role': 'assistant'}]