23. During depolarization a. potassium ions (K*) flow into the neuron. potassium ions (K*) flow out of the neuron. sodium ions (Na*) flow into the neuron. sodium ions (Na*) flow out of the neuron. b. с. d. During repolarization potassium ions (K*) flow into the neuron. a. b. potassium ions (K*) flow out of the neuron. sodium ions (Na*) flow into the neuron. с. d. sodium ions (Na*) flow out of the neuron. 24. During the refractory period odium ions (Nat) 25. are pumped out of the neuron.

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