[问答题]
1.Explain why a restkls 52 1j;3ktdi- ktzuc .iop,ing jq*3 /hgvh njcz;t 79*bqw. mwpotential is negative.
2.Explain how the structure of a neuron is adapted to its function.
3.Describe the events that occur to propagate an action potential within a neuron and between two neurons.
