What is the function of the sodium-potassium pump?
Ch. 15 Neurons & Action Potentials

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Biology
•
11th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The sodium-potassium pump exchanges K+ and Na+ to reestablish the resting potential.
2.
FLASHCARD QUESTION
Front
What happens during depolarization in a neuron?
Back
During depolarization, sodium channels open, allowing Na+ to flow into the neuron.
3.
FLASHCARD QUESTION
Front
What is the Node of Ranvier?
Back
The Node of Ranvier is a junction along a myelinated axon where Na+ and K+ flow in and out of the neuron.
4.
FLASHCARD QUESTION
Front
What stage of action potential has both Na+ and K+ present in large concentrations inside the neuron?
Back
Depolarization.
5.
FLASHCARD QUESTION
Front
What does the resting potential of a neuron refer to?
Back
The resting potential is the state of a neuron when it is not actively sending a signal, typically around -70mV.
6.
FLASHCARD QUESTION
Front
What is depolarization?
Back
Depolarization is the process by which the membrane potential becomes less negative (more positive) due to the influx of Na+.
7.
FLASHCARD QUESTION
Front
What is repolarization?
Back
Repolarization is the process of returning the membrane potential to a more negative value after depolarization, primarily through the efflux of K+.
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