Neuron X has standard resting permeabilities, and standard intracellular and extracellular concentrations of sodium, potassium, chloride and calcium. When depolarised to +58mV by a strong, excitatory synaptic input, what direction will Na+ move across the membrane if its selective channel were opened? 神经元 X 具有标准的静息膜通透性，以及标准的细胞内和细胞外钠、钾、氯和钙浓度。当受到强烈的兴奋性突触输入而去极化至 +58mV 时，如果其选择性通道打开，Na0 将在膜上向哪个方向移动？ (there are only 3 options in this question) （本题只有 3 个选项）单项选择题

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