Biology 30 Diploma Practice Questions - Alberta Biology 30 Diploma Examination Exam

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During the depolarization phase of an action potential, which ion movement is primarily responsible for the change in membrane potential?

Potassium (K+) moving out of the neuron Sodium (Na+) moving into the neuron Chloride (Cl-) moving into the neuron Calcium (Ca2+) moving out of the neuron

Correct Answer:

Sodium (Na+) moving into the neuron

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