*Remember to load your trailer with more weight in front of the trailer axle than behind it. A trailer with too much weight on the back end can put it and the tow vehicle into a violent and uncontrollable wag that can literally flip the tow vehicle. Overloading a trailer can cause serious injury or equipment damage.
Most recent answer: Dopamine is both a hormone and a neurotransmitter. It acts as a hormone in the blood and as a neurotransmitter in the central nervous system.
Neurobiology of DOPA as a Neurotransmitter - CRC Press Book New research suggests it is highly probable that DOPA, in addition to being a precursor to dopamine, functions by itself as a neurotramsmitter and/or neuromodulator. Neurobiology of DOPA as a Neurotransmitter integrates background information about DOPA as an inert amino acid precursor of dopamine with the evidence showing that DOPA fulfills several criteria of neurotransmitters.