Quick Answer. The function of motor neurons is to release the neurotransmitter acetylcholine, which are released at a junction known as the neuromuscular junction, that bind to postsynaptic receptors, causing the muscle fiber to respond and result into a muscle movement.
The critical element that culturally sets humans apart from other species is the functional superiority of the human brain. That existing human culture has three axial components, namely politics, religion, and technology, which influence the affairs of mankind, must be obvious to all with a passing interest in human behaviour.
Although humans are sometimes divided into races, the morphological variation between races is not indicative of major differences in DNA. For example, recent genetic studies show skin color may drastically change in as few as 100 generations, spanning 2,500 years, as a result of environmental influences. Furthermore, the DNA of two humans chosen at random generally varies by less than 0.1 percent. This is less genetic variation than other types of hominids (such as chimpanzees and orangutans), leading some scientists to describe all humans as belong to the same race â the human race.