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 small (average diameter, 30 nm), intracellular, membrane-bound vesicles near the presynaptic membrane of a synaptic junction, containing the transmitter substance that, in chemical synapses, mediates the passage of nerve impulses across the junction. See also: synapse.