how-does-the-selectivity-filter-in-ion-channels-ensure-ion-specificity

Question

How does the selectivity filter in ion channels ensure ion specificity?

Accepted Answer

By selectively disassociating ions from water based on their charge.

Answer

By allowing only ions of a specific size to pass through.

Answer

By changing the shape of the channel to fit specific ions.

Answer

By using ATP to actively transport specific ions.