The "selectivity" of a particular ion channel refers to ...

[geoffrey]

The "selectivity" of a particular ion channel refers to its
A) permitting passage by positive but not negative ions.
B) permitting passage by negative but not positive ions.
C) ability to change its size depending on the ion needing transport.
D) binding with only one type of neurotransmitter.
E) permitting passage only to a specific ion.

[j_sun]

I recall doing this last year, it's E, bye bye!