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.
This feeling of stress, often referred to as the fight-or-flight response, is directed by the sympathetic nervous system. The sympathetic nerve system is used by your body in response to stress, or, in other words, anything that your body perceives as a threat. Acting intelligently, your bodyâs response to threats is to prepare for action: fight-or-flight. Even thinking of a stressful event will cause you to experience the influence of the sympathetic nerve system in your body.