2) structure of neuron ① cell body: cell membrane unit membrane-irritability, receive stimuli initiate and conduct nerve impulse e membrane proteins-ions channel and receptor --cell nucleus: large and round, centrally- located, less heterochromatin, so pale stained, with a large, clear nucleolus2) structure of neuron ① cell body: ---cell membrane: unit membrane-irritability, receive stimuli, initiate and conduct nerve impulse membrane proteins-ions channel and receptor ---cell nucleus: large and round, centrally￾located, less heterochromatin, so pale stained, with a large, clear nucleolus