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Action Potentials Quiz

Focused SBA-style practice, followed by the answer and explanation for every question.

Focused SBA-style practice, followed by the answer and explanation for every question.

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1
Which ionic movement is primarily responsible for the rapid depolarisation phase of a typical neuronal action potential?
2
Which statement best explains why an action potential, once initiated in a neurone, has the same size every time it occurs?
3
Which statement best explains why action potentials propagate more rapidly along myelinated axons compared with unmyelinated axons?

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