Which of the Following Is the Correct Chronological Order for Presynaptic

question 92

Multiple Choice

Which of the following is the correct chronological order for presynaptic events?

• A)calcium ion influx occurs, action potential reaches the axon terminal, vesicle fuses with membrane, neurotransmitter diffusion occurs
• B)action potential reaches the axon terminal, calcium ion channels open, exocytosis occurs, neurotransmitter diffusion occurs
• C)exocytosis occurs, calcium ion influx occurs, action potential reaches the axon terminal, membrane depolarization occurs
• D)action potential reaches the axon terminal, calcium ion channels open, neurotransmitter diffusion occurs, exocytosis occurs

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