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.
Apes and humans are so similar it is impossible not to wonder what exactly separates us from our closest relatives on earth. There is no other creature that so charms and fascinates the beholder as do these little effigies of the human race, wrote R L Garner in 1896.