Your gut synthesizes a host of small molecules which can directly signal the brain. One of these, called ghrelin, is synthesized primarily in the stomach, and is produced when the stomach is empty. Ghrelin released into the blood ultimately finds its way into the brain, and crosses the blood-brain barrier to reach a part of the brain called the hypothalamus. Now, the hypothalamus has two interesting types of cells.
History >> Ancient China. The Shang Dynasty was the first Chinese dynasty with written records. The Shang ruled from around 1600 BC to 1046 BC. Some historians consider the Shang to be the first Chinese Dynasty. Other historians consider it to be the second dynasty, coming after the legendary Xia Dynasty. History.
The Qin (or Châin) Dynasty, from which the name China is derived, ruled for only a brief period-from 221 to 207 BC. But during that time it established the approximate boundaries and basic administrative system that lasted in China for the next 2,000 years.