Glutamate
This implies that the subject is in a dark room.
The original is lighted. The light reflects from the light areas and not from the dark areas. The reflected light shines on parts of a charged photoreceptor and removes the charge from those areas, but does not remove the charge from areas represented by the dark areas of the original. The charged parts of the photoreceptor attract the toner (dry ink), and the uncharged areas do not. Toner is then transferred from the photoreceptor to the paper and you get an image.
The substance that is released at an axonal ending to propagate the nerve impulse to the next nerve or muscle is called
serotonin
neurotransmitter neurotransmitter neurotransmitter
After the neurotransmitter is released from the nerve terminal, it moves across the synapse. At that point, the neurotransmitter may bind with receptors.
Acetylcholine.
neurotransmitter (:
ACETYLCHOLINE
neurotransmitters
You do not have single neurotransmitter, which is released from axon terminals. There are many. Some facilitate the conduction of the impulse and others inhibit the same. You have acetylcholine, norepinephrine, dopamine and many others acting as neurotransmitter.
A neurotransmitter.