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Action Potential Propagation in Unmyelinated Neurons

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






1An action potential...
A)causes the neuron cell membrane to become unable to alter its charge.
B)causes the outside of the neuron cell membrane to become positively charged in reference to the inside.
C)causes the inside of the neuron cell membrane to become positively charged in reference to the outside.
D)causes the inside of the neuron cell membrane to become negatively charged in reference to the outside.
E)causes the inside of the neuron cell membrane to become neutrally charged in reference to the outside.



2Depolarization of the neuron inner membrane is caused by...
A)the arrival of an inhibitory post synaptic potential (IPSP).
B)the arrival of an excitatory post synaptic potential (EPSP).
C)the opening of the sodium gates, and the diffusion of sodium ions into the neuron.
D)the opening of the potassium gates, and the diffusion of potassium ions out of the neuron.
E)the opening of the chloride gates, and the diffusion of chloride ions into the neuron.



3Repolarization of the neuron inner membrane is caused by...
A)the arrival of an inhibitory post synaptic potential (IPSP).
B)the arrival of an excitatory post synaptic potential (EPSP).
C)the opening of the sodium gates, and the diffusion of sodium ions into the neuron.
D)the opening of the potassium gates, and the diffusion of potassium ions out of the neuron.
E)the opening of the chloride gates, and the diffusion of chloride ions into the neuron.



4Signal conduction on an unmyelinated neuron is a chain reaction occurring along the neural membrane.
A)True
B)False



5An action potential cannot occur until the inner membrane reaches resting membrane potential, at which point an action potential will be propagated.
A)True
B)False







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