Parcel Select. Parcel Select is an economical choice for large or heavy packages and is the only USPS service that can be used for packages over 108 in girth. Cost is determined based on the distance, weight and dimensions of the mailpiece.
Definition of dopamine. : a monoamine C8H11NO2 that is a decarboxylated form of dopa and that occurs especially as a neurotransmitter in the brain.
Dopamine is a brain chemical called a neurotransmitter. Neurotransmitters accommodate signaling between nerve cells (neurons). Dopamine is used to modulate certain physiological functions â including memory, motor movement, sleep, cognition, libido and addiction. It is also responsible for regulating mood, pleasure and the reward cycle.