Place the events in the correct sequence. not all items will be used.
a) neurotransmitter crosses synaptic cleft
b) neurotransmitter attaches to receptors on a muscle, neuron, or gland cell
c) calcium leaves the synaptic knob
d) neurotransmitter enters synaptic knob by endocytosis
e) voltage-gated calcium channels open
f) calcium enters the synaptic knob
g) synaptic vesicles merge with synaptic knob plasma membrane
h) neurotransmitter is released by exocytosis
i) action potential reaches synaptic knob