Some ages of license are actually higher than the age of majority. For example, the age of license to purchase alcoholic beverages is 21 in all U.S. states. Another example is the voting age, which prior to the 1970s was 21, while the age of majority was 18 in most states.
The nervous system is composed of the brain and spinal cord, together known as the central nervous system, and a vast array of peripheral nerves that transmit information to and from these central structures. The nervous system may be damaged by infection, injury, vascular problems, inflammation, and degeneration.
The sense organs contain receptors that are sensitive to stimuli. The nervous system consists of the central nervous system - brain and spinal cord -and peripheral nerves. Nerve impulses travel through the axons of neurones - nerve cells. Reflex actions are fast, automatic and protective responses.