VWO Natuur, Leven En Technologie Practice Questions - Netherlands VWO Natuur, Leven En Technologie (NLT) - Schoolexamen

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During the propagation of an action potential along an unmyelinated axon, what mechanism accounts for the refractory period behind the nerve impulse?

Inactivation of voltage-gated Na+ channels and prolonged opening of voltage-gated K+ channels Depletion of ATP stored in mitochondria along the axonal cytoplasm Reversal of the Na+/K+ ATPase pump direction during hyperpolarization Permanent opening of ligand-gated Cl- channels across the node of Ranvier

Correct Answer:

Inactivation of voltage-gated Na+ channels and prolonged opening of voltage-gated K+ channels

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