What do the colors on the flag of Norway mean? Credit: Thinkstock Images Stockbyte Getty Images. The Union Jack is composed of the flags of three patron saints layered one over the other. The central red cross on a white field is the flag of St. George, the patron saint of England.
Synaptic vesicles contain thousands of neurotransmitter. The  neurotransmitters are packed into a small membrane bound synaptic  vesicles. There are thousands of neurotransm â¦ itter molecules.
The part of the plasma membrane of the nerve ending that is specialized to form functional contacts with other cells is the synapse. Figure 8.6. Diagrammatic representation of an excitatory synapse, showing the spherical vesicles and the presynaptic density. View an EM of a nerve ending with spherical vesicles.