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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Definitions:

Delay of Gratification

The ability to resist an immediate reward in preference for a later, often greater, reward, reflecting self-control and forward planning.

Academic and Social Competence

The ability to achieve in academic environments and to successfully interact socially with others.

General Coping Ability

The overall capability of an individual to manage stress, adversity, or change effectively.

Self-Reliance

The reliance on one's own capabilities, judgment, or resources rather than those of others.