Which Step Is Not Part of the Sequence of Events

question 9

Multiple Choice

Which step is not part of the sequence of events that triggers synaptic transmission from a neuron to a muscle fiber?

• A) Entry of Ca²⁺ into the presynaptic terminal
• B) Release of norepinephrine into the synaptic cleft
• C) Opening of Ca²⁺ channels in the presynaptic terminal
• D) Arrival of an action potential at the presynaptic terminal
• E) Fusion of synaptic vesicles with the presynaptic membrane