When an Action Potential Reaches the Presynaptic Terminal

question 231

Multiple Choice

When an action potential reaches the presynaptic terminal,

• A) calcium ions diffuse into the presynaptic terminal through voltage-gated ion channels.
• B) acetylcholine moves into the presynaptic terminal.
• C) a local potential is generated in the presynaptic terminal.
• D) ligand-gated ion channels in the presynaptic terminal are opened.
• E) nothing else happens.

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