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Ghrelin and leptin are the two main hormones associated with the control of eating. Ghrelin, which is released from the stomach, activates the hypothalamus and increases a person's appetite. The levels of...

Simply put, it is down to the attraction between positive and negative particles. The protons within the nucleus of an atom make the nucleus 'positive'. In contrast, electrons are 'negative'. If you imagi...

The term equilibrium describes the point at which supply and demand for a good or service meet to create an equilibrium price (E1) and an equilibrium quantity (Q1). The term equilibrium shows how the mark...

This can be tricky but there are a few ways to remember this: POR: 1. Approximate place / "a traves de" - e.g. el tren de Glasgow pasa POR Linlithgow 2. Approvcimate time (except for hours) - e....

This is a common question. After learning about translation in A-level biology and the importance of converting DNA into proteins (the building block of organisms), students often assume that all<...