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.
Organism obtaining nourishment from or living one another organism (the 'host') for survival and usually harming it and causing disease. Some parasites are independent and some depend entirely on their hosts and separate only when either one of them dies. Human parasites include bacteria, fungi, lice, viruses, and worms.