What are neurotransmitters and what do they do in neuronal synapses?

I share the link of my channel. / @mauriciogiuliodori
It describes what a neurotransmitter is and what effect it has on neuronal synapses (neuronal communication). Some examples of neurotransmitters are given such as acetylcholine, glutamate, GABA, glycine, norepinephrine, serotonin, dopamine, endorphins, substance P, neuropeptide Y, etc. The two types of existing ligand receptors are described: the channel receptor and the G protein-coupled receptor. There are Na channel receptors such as the nicotinic cholinergic receptor and the glutamate receptor. There is a receptor channel for K, such as the GABAergic receptor. There are receptor-channels for Cl, such as the GABAergic and glycinergic receptors. It describes how they are distributed on the surface of the neuron. Activation of ligand receptors on postsynaptic membranes produces excitatory and inhibitory postsynaptic potentials.