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.
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Question: 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.

Answer: Science


Question: After initiation into the Khalsa (KAHL-sah) in this religion, adherents must wear a wooden comb, known as the "kanga"(KAHN-gah), and a steel bracelet, known as the "kara" (KAH-rah), which are two of the five K's. Arjun (AR-joon) Dev compiled this religion's holy text, the Adi Granth, which contains many of the sayings of the first leader, or guru, of this religion. For 10 points, identify this religion founded by Nanak, whose adherents are mostly found in the Punjab region.

Answer: Social Science


Question: Holmes and Marsden used the Melnikov formalism to show that coupling perturbations in this system render it non-integrable due to the introductions of horseshoes, which are intersections between stable and unstable manifolds. The differential equation describing the dynamics of a nonlinear one of these systems contains a term proportional to the sine of the angle, which means that displacement of such a system is proportional to an elliptic integral of the first kind. A linear variant of this system avoids that complication by Taylor expanding around the equilibrium point and assuming small-angle oscillations, which gives a period of two pi times the square root of the length over the gravitational acceleration. Also exhibiting chaos when two of these are connected in a "double" variant, for ten points, identify this dynamical system, a harmonic oscillator consisting of a weight on a massless rod.

Answer:
Science