根据离子学说,神经细胞动作电位的上升支产生主要是由( )

A、K[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]突然迅速外流
B、K[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]外流逐渐衰减
C、Na[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]迅速大量内流
D、Cl[img=~\/QImg\/2013-06-27-14-49-35\/image002.gif]大量内流
E、Na[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]-K[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]泵的活动