Quick Answer. Voltaire wrote Candide as a satire of the then-prevalent philosophical optimism advanced by Gottfried Wilhelm Leibniz. Voltaire, moved by contemporary events like the Seven Years' War and the 1755 Lisbon earthquake, felt that optimism was a naive way of viewing the world.
Neurons carry impulses from one place to another, around the many parts of the nervous system. They connect receptors to the central nervous system and also connect one part of the nervous system to another, for example in the brain and spinal cord.
Function: To transmit messages from one part of your body to another. Neurons: Messenger cells in your nervous system. Nerve impulses: Electrical signals carrying messages. Neurotransmitters: Chemicals released by one neuron to excite a neighbouring one.