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.