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Questions and Answers
What is the process called when the depolarization travels along a nerve or muscle fiber?
Nerve or muscle impulse
How are sodium and potassium membrane concentration differences re-established after action potentials are completed?
By the action of the Na+-K+ pump
What ions diffuse to the inside during depolarization?
Sodium ions
Which ions diffuse to the outside during repolarization?
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What type of process is the re-establishment of sodium and potassium membrane concentration differences?
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What energy system of the cell provides the energy for the Na+-K+ pump operation?
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Why does the 'recharging' of the nerve fiber require energy?
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What happens to the sodium ions that have diffused to the interior of the cell during action potentials?
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How are potassium ions that have diffused to the exterior returned to their original state?
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What is the importance of re-establishing sodium and potassium membrane concentration differences?
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