The document discusses the structure and function of the nervous system. It notes that neurons, along with supporting glial cells, make up the central and peripheral nervous systems. Information is transmitted between neurons electrochemically through cell bodies, axons, and synapses using neurotransmitters. The central nervous system consists of the brain and spinal cord, which contain grey matter on the inside and white matter on the outside. The peripheral nervous system connects receptors, the CNS, and effectors through nerves. Sensory nerves transmit information from receptors to the CNS while motor nerves transmit information from the CNS to effectors.