In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

One major pathway involving this compound is the tuberoinfundibular one that transfers it from the hypothalamus to the pituitary gland. This compound is involved in voluntary motor control via its nigriostriatal pathway, and it binds with lactotrophs in order to inhibit the secretion of prolactin, which is a major antagonist of it. It is the immediate precursor of norepinephrine in the epinephrine synthesis pathway. Antagonists of this neurotransmitter are used to treat schizophrenia, and deficiency of this neurotransmitter can lead to Parkinsons disease. For 10 points, name this neurotransmitter associated with the brain's pleasure center whose precursor is L-dopa.
Science

This battle started after troops under Henry Heth (HEETH) spotted John Buford's cavalry. Key locations in this battle included the Peach Orchard and Devil's Den. One general in this battle, Dan Sickles, disobeyed orders by moving his corps from its location along Cemetery Ridge. That ridge was the object of Pickett's Charge at the end of this battle. George Meade's victory in this battle ended a Confederate invasion of the North. For 10 points, name this battle whose site was later the location of an Address by Abraham Lincoln.
History

The narrator of one poem by this author dismisses a "red sword of virtue," while the speaker of another of his poems from the same collection encounters a "creature, naked, bestial" who "held his heart in his hands/and ate of it. " Other works by this author of the collection The Black Riders include a short story in which Johnny accuses the Swede of cheating at a card game, and another based on his own experiences after the sinking of the Commodore. This author of "The Blue Hotel" and "The Open Boat" also wrote novels starring a "girl of the streets" and Private Henry Fleming. For 10 points, identify this author of Maggie and The Red Badge of Courage.
Literature