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.
A
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Answer the following statement true (T) or false (F)
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Indicate whether the statement is true or false