Question: Serotonin is a neuromodulator involved in regulation of mood and behavior. Development in the limbic system plays an important role in determining rewards and punishments and processing emotional experience and social information. Changes in the levels of the neurotransmitters dopamine and serotonin in the limbic system make adolescents more emotional and more responsive to rewards and stress. The corresponding increase in emotional variability also can increase adolescents' vulnerability. The effect of serotonin is not limited to the limbic system: Several serotonin receptors have their gene expression change dramatically during adolescence, particularly in the human frontal and prefrontal cortex .
Is there an answer to this question: Serotonin is a neuromodulator that is involved in regulation of what?

Answer: mood and behavior

Question: Slavs are the largest Indo-European ethno-linguistic group in Europe. They inhabit Central Europe, Eastern Europe, Southeast Europe, North Asia and Central Asia. Slavs speak Indo-European Slavic languages and share, to varying degrees, some cultural traits and historical backgrounds. From the early 6th century they spread to inhabit most of Central and Eastern Europe and Southeast Europe, whilst Slavic mercenaries fighting for the Byzantines and Arabs settled Asia Minor and even as far as Syria. The East Slavs colonised Siberia and Central Asia.[better source needed] Presently over half of Europe's territory is inhabited by Slavic-speaking communities, but every Slavic ethnicity has emigrated to other continents.
Is there an answer to this question: Who colonised the Arabs?

Answer: unanswerable

Question: The Louvre was the world's most visited art museum in 2014, with 9.3 million visitors. Its treasures include the Mona Lisa (La Joconde) and the Venus de Milo statue. Starkly apparent with its service-pipe exterior, the Centre Georges Pompidou, the second-most visited art museum in Paris, also known as Beaubourg, houses the Musee National d'Art Moderne. The Musee d'Orsay, in the former Orsay railway station, was the third-most visited museum in the city in 2014; it displays French art of the 19th century, including major collections of the Impressionists and Post-Impressionists. The original building - a railway station - was constructed for the Universal Exhibition of 1900. The Musee du quai Branly was the fourth-most visited national museum in Paris in 2014; it displays art objects from Africa, Asia, Oceania, and the Americas. The Musee national du Moyen Age, or Cluny Museum, presents Medieval art, including the famous tapestry cycle of The Lady and the Unicorn. The Guimet Museum, or Musee national des arts asiatiques, has one of the largest collections of Asian art in Europe. There are also notable museums devoted to individual artists, including the Picasso Museum the Rodin Museum, and the Musee national Eugene Delacroix.
Is there an answer to this question: What is the second most visited art museum in Paris?

Answer: Centre Georges Pompidou

Question: The polytechnics of Thuringia are based in Erfurt (4,500 students), Jena (5,000 students), Nordhausen (2,500 students) and Schmalkalden (3,000 students). In addition, there is a civil service college in Gotha with 500 students, the College of Music "Franz Liszt" in Weimar (800 students) as well as two private colleges, the Adam-Ries-Fachhochschule in Erfurt (500 students) and the SRH College for nursing and allied medical subjects (SRH Fachhochschule fur Gesundheit Gera) in Gera (500 students). Finally, there are colleges for those studying for a technical qualification while working in a related field (Berufsakademie) at Eisenach (600 students) and Gera (700 students).
Is there an answer to this question: Where is the civil service college of Thuringia?

Answer:
Gotha