Article: The functions of the brain depend on the ability of neurons to transmit electrochemical signals to other cells, and their ability to respond appropriately to electrochemical signals received from other cells. The electrical properties of neurons are controlled by a wide variety of biochemical and metabolic processes, most notably the interactions between neurotransmitters and receptors that take place at synapses.

Question: What type of signals do neurons transfer from one another?
Ans: electrochemical

Article: Navigation is based on a variety of senses. Many birds have been shown to use a sun compass. Using the sun for direction involves the need for making compensation based on the time. Navigation has also been shown to be based on a combination of other abilities including the ability to detect magnetic fields (magnetoception), use visual landmarks as well as olfactory cues.

Question: What is navigation based on?
Ans: a variety of senses

Article: In mid-November The Shevchenko Ukrainian Language Society was officially registered. On November 19, 1989, a public gathering in Kiev attracted thousands of mourners, friends and family to the reburial in Ukraine of three inmates of the infamous Gulag Camp No. 36 in Perm in the Ural Mountains: human-rights activists Vasyl Stus, Oleksiy Tykhy, and Yuriy Lytvyn. Their remains were reinterred in Baikove Cemetery. On November 26, 1989, a day of prayer and fasting was proclaimed by Cardinal Myroslav Lubachivsky, thousands of faithful in western Ukraine participated in religious services on the eve of a meeting between Pope John Paul II and Soviet President Gorbachev. On November 28, 1989, the Ukrainian SSR's Council for Religious Affairs issued a decree allowing Ukrainian Catholic congregations to register as legal organizations. The decree was proclaimed on December 1, coinciding with a meeting at the Vatican between the pope and the Soviet president.

Question: Where were the activists reburied?
Ans: Baikove Cemetery.

Article: Energy transfer can be considered for the special case of systems which are closed to transfers of matter. The portion of the energy which is transferred by conservative forces over a distance is measured as the work the source system does on the receiving system. The portion of the energy which does not do work during the transfer is called heat.[note 4] Energy can be transferred between systems in a variety of ways. Examples include the transmission of electromagnetic energy via photons, physical collisions which transfer kinetic energy,[note 5] and the conductive transfer of thermal energy.

Question: The portion of energy which does not do work during the transfer is called what?
Ans:
heat