兴奋性突触后电位的产生,是由于突触后膜提高了对下列哪种离子的通透性( )

A、Ca[img=~\/QImg\/2013-06-27-14-49-35\/image006.gif]
B、CI[img=~\/QImg\/2013-06-27-14-49-35\/image007.gif]
C、K[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]
D、Na[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]和K[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]
E、尤其是Na[img=~\/QImg\/2013-06-27-14-49-35\/image001.gif]