IB Biology HL C2.2.3 Nerve Impulses As Action Potentials Topic Practice

$\mathrm{K}^{+}$ions are pumped out of the cell to depolarize the membrane.

Ion channels let $\mathrm{K}^{+}$diffuse into the cell to depolarize the membrane.

$\mathrm{Na}^{+}$ions are pumped into the cell to repolarize the membrane.

Ion channels let $\mathrm{Na}^{+}$diffuse into the cell to depolarize the membrane.