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 neurotransmitter, a chemical that is responsible for transmitting signals in between the nerve cells of the brain (neurons). Dopamine is essential for maintaining proper mood levels, feelings of optimism, being motivated, and even feelings of satisfaction, bliss, and euphoria.