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⟩ A class of ion passes through an open channel

* a) When there is an electrochemical gradient for this ion across the membrane.

* b) Because ion pumps transport the ion across the membrane

* c) Because the selectivity filter conducts the ion through it.

* d) Because other ions of the same class link up together, and drag the ion with it.

* e) Because the voltage gates act as paddles, to sweep the ions through

Answer - a

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