神经细胞在产生动作电位时，去极相的变化趋向于（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25932' and id < 2179282 and id<>'2179282' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25932' and id > 2179282 and id<>'2179282' order by id asc limit 5