Answer:
Neurotransmitter
Step-by-step explanation:
The brain has several types of neurotransmitter molecules: Glutamate, Catecholamines and acetylcholine.The term catecholamines includes the neurotransmitters dopamine and norepinephrine. Dopamine and nor-epinephrine are widely present in the brain and peripheral nervous system. The acetylcholine is a molecule found in the neurons and stored by the vesicles.
Glutamate has excitory effect on the nerve fibres in the central nervous system. It is mostly found in synaptic vesicle of nerves terminals in abundance and can be released through exocytosis. The glutamate has special transporters on the plasma membrane that allow it to be transported across neurones.