In Order to Trigger the Release of Neurotransmitter from a Neuron

Multiple Choice

In order to trigger the release of neurotransmitter from a neuron terminal, calcium ions

A) exit the synaptic knob through diffusion.
B) bind to proteins on the surface of synaptic vesicles.
C) penetrate the synaptic vesicles and bind to molecules of neurotransmitter.
D) bind to ion channels on the neuron membrane and cause them to open for the transmitter.