突触小泡 掉器 极神经元是其突触相圆结构质式图 树突棘及棘器模式图 ② dendrite(树突) many short and more branches structure similar to cell body dendritic spine (synapse) and spine apparatus (structure formed by 2-3 layerS SER) Function: receive the information② dendrite(树突): ⚫ many, short and more branches ⚫ structure similar to cell body ⚫ dendritic spine (synapse) and spine apparatus (structure formed by 2-3 layers SER) ⚫ Function: receive the information