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Action Potential Propagation in an Unmyelinated Axon

View the animation below, then complete the quiz to test your knowledge of the concept.






1An action potential
A)prevents the neuron cell membrane from altering its charge.
B)causes the inside of the neuron cell membrane to become positive and the outside negative.
C)causes the inside of the neuron cell membrane to become positive and the outside neutral.
D)causes the outside of the neuron cell membrane to become positive and the inside negative.
E)causes the outside of the neuron cell membrane to become positive and the inside neutral.



2An action potential generates local currents that tend to ________ the membrane immediately adjacent to the action potential.
A)depolarize
B)repolarize
C)hyperpolarize
D)stabilize
E)neutralize



3The absolute refractory period is the period of time during which
A)a second action potential cannot be generated.
B)a second action potential is generated.
C)the action potential ceases.
D)the action potential decreases in magnitude.
E)the action potential changes direction.



4Action potential propagation occurs in both directions along the axon.
A)True
B)False



5Threshold is the minimum current required for the cell membrane to generate an action potential.
A)True
B)False







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