הצגת מקור

Communication details between neurons is conducted by action of chemicals across a little gap called the synapse. Chemicals, known to as neurotransmitters, are released from one nerve cell at the presynaptic nerve port. Chemicals then cross the junction exactly where they may be accepted by the next neuron at a specialized web site called a structure. The action that follows activation of a receptor website can be either depolarization (an excitatory post synaptic potential) or hyper polarization (an inhibitory post synaptic potential). A depolarisation makes it Likely that a particular action potential definitely will fire; a hyperpolarization makes it LESS possible that an action potential will fire. 
Discovery of Chemicals 
[http://serotonin.onsugar.com/ neurotransmitter serotonin]
In 1921, a great Austrian scientist called Otto Loewi discovered the first neurochemical. In his experiment (which came to him in a dream), he utilized two frog hearts. One middle (heart #1) ended up being still coupled to the vagus nerve. Middle #1 was put in a chamber which was filled with saline. This room was connected to a 2nd chamber which contained middle #2. So, mobile from slot provided #1 was allowed to flow into house #2. Electrical stimulation of the vagus nerve (that was attached to heart #1) brought about middle #1 to slow down. Loewi also seen which following a delay, heart #2 also slowed down. From this experiment, Loewi hypothesized which electrical stimulation of the vagus nerve released a chemical into the mobile of room #1 that flowed into house #2. He labeled as this chemical "Vagusstoff". We now understand this chemical as the neurotransmitter called acetylcholine.

Neurotransmitter Kinds 
Generally there are lots of types of chemicals which act as neurochemical substances. Under is a list of some of them. 
Little Molecule Neurotransmitter Substances 
Acetylcholine (ACh)	Dopamine (DA)	Norepinephrine (NE)

[http://www.dailystrength.org/people/1614537/journal/3853266 serotonin] (5-HT)	Histamine	Epinephrine
Amino Acids 
Gamma-aminobutyric acidic (GABA)	Glycine	Glutamate
Aspartate
Neuroactive Peptides - partial list only! 
bradykinin	beta-endorphin	bombesin	calcitonin
cholecystokinin	enkephalin	dynorphin	insulin
gastrin	substance P	neurotensin	glucagon
secretin	somatostatin	motilin	vasopressin
oxytocin	prolactin	thyrotropin	angiotensin II
sleep peptides	galanin	neuropeptide Y	thyrotropin-releasing hormone
gonadotropnin-releasing hormone	growth hormone-releasing hormone	luteinizing hormone	vasoactive intestinal peptide
Soluble Smells 
Nitric Oxide (NO)	Carbon Monoxide