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.
Synaptic vesicle exocytosis occurs in neurons of the nervous system. Neurons communicate through electrical or chemical (neurotransmitters) messages that are exchanged at synaptic junctions between nerve cells. Synaptic vesicles are formed by endocytosis of the plasma membrane at pre-synaptic nerve terminals.