Some membrane channels can selectively allow in one type of ion (e.g., K+) but not others. The ability to restrict passage to only certain ions largely depends on:
A)where on the membrane the channel is.
B)what type of neuron the channel is on.
C)the size and shape of the channel.
D)the pigmentation of the channel.

Question

Quizplus · Accepted Answer

The selectivity of ion channels is primarily determined by the size and shape of the channel, which allows only ions of a specific size and charge to pass through.

Some Membrane Channels Can Selectively Allow in One Type of Ion