QUES: In 1955, DC Sinclair and G Weddell developed peripheral pattern theory, based on a 1934 suggestion by John Paul Nafe. They proposed that all skin fiber endings (with the exception of those innervating hair cells) are identical, and that pain is produced by intense stimulation of these fibers. Another 20th-century theory was gate control theory, introduced by Ronald Melzack and Patrick Wall in the 1965 Science article "Pain Mechanisms: A New Theory". The authors proposed that both thin (pain) and large diameter (touch, pressure, vibration) nerve fibers carry information from the site of injury to two destinations in the dorsal horn of the spinal cord, and that the more large fiber activity relative to thin fiber activity at the inhibitory cell, the less pain is felt. Both peripheral pattern theory and gate control theory have been superseded by more modern theories of pain[citation needed].
What did Ronald Wall and Patrick Melzack introduce?

ANS: unanswerable

QUES: The Romans liked bright colors, and many Roman villas were decorated with vivid red murals. The pigment used for many of the murals was called vermilion, and it came from the mineral cinnabar, a common ore of mercury. It was one of the finest reds of ancient times the paintings have retained their brightness for more than twenty centuries. The source of cinnabar for the Romans was a group of mines near Almaden, southwest of Madrid, in Spain. Working in the mines was extremely dangerous, since mercury is highly toxic; the miners were slaves or prisoners, and being sent to the cinnabar mines was a virtual death sentence.
What city is southwest of Almaden?

ANS: unanswerable

QUES: New Haven (local /nu hevn/, noo-HAY-vn), in the U.S. state of Connecticut, is the principal municipality in Greater New Haven, which had a total population of 862,477 in 2010. It is located on New Haven Harbor on the northern shore of the Long Island Sound in New Haven County, Connecticut, which in turn comprises the outer limits of the New York metropolitan area. It is the second-largest city in Connecticut (after Bridgeport), with a population of 129,779 people as of the 2010 United States Census. According to a census of 1 July 2012, by the Census Bureau, the city had a population of 130,741.
New Haven County makes up the outer limits of what major metropolitan area?

ANS: New York metropolitan area

QUES: In 1976 the future Labour prime minister James Callaghan launched what became known as the 'great debate' on the education system. He went on to list the areas he felt needed closest scrutiny: the case for a core curriculum, the validity and use of informal teaching methods, the role of school inspection and the future of the examination system. Comprehensive school remains the most common type of state secondary school in England, and the only type in Wales. They account for around 90% of pupils, or 64% if one does not count schools with low-level selection. This figure varies by region.
What is the only kind of school operating in England?

ANS:
unanswerable