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Suppose an Action Potential Arrives at the Axon Terminal but the Voltage-Gated

Question 92

Multiple Choice

Suppose an action potential arrives at the axon terminal but the voltage-gated calcium channels at the terminal fail to open.What will most likely happen to the action potential?


A) It will stop,because Ca2+ will not enter the presynaptic cell and the neurotransmitter will not be released.
B) It will stop,because Ca2+ will not be available to act as a neurotransmitter in place of acetylcholine.
C) It will continue,because Ca2+ will be released by an electrical method and the neurotransmitter will be released.
D) It will continue,because although the neurotransmitter will not be released,Na+ and K+ will be released in the postsynaptic membrane.
E) It will continue,because although Ca2+ will not be released,synaptic vesicles will use another method to fuse with the presynaptic membrane.

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