When voltage-gated sodium channels open due to the depolarization of a neuron or axon, which of the statements below best describes why sodium ions enter the neuron?单项选择题

A

There are more negatively charged ions inside than outside

B

There is more sodium outside the neurons than inside (a concentration gradient)

C

The combination of the concentration and the relative negative potential inside the neuron.

D

The balance of sodium and chloride inside the cell is greater than that ratio outside the neuron.

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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? (there are only 3 options in this question)

When voltage-gated sodium channels open due to the depolarization of a neuron or axon, which of the statements below best describes why sodium ions enter the neuron? 当神经元或轴突去极化导致电压门控钠通道打开时，下列哪项陈述最能描述钠离子进入神经元的原因？

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