nervous system

• the nervous system is made up of the CNS (Central Nervous System) and the PNS (Peripheral Nervous System)
• the CNS (Central Nervous System) is made up of the brain and spinal cord
• the PNS (Peripheral Nervous System) is made up of the somatic nervous system and the autonomic nervous system [which then make up the sympathetic and parasympathetic divisions]
• the somatic nervous system is for voluntary actions
• the automatic nervous system is for involuntary actions
• CNS (Central Nervous System) consists of neurons/nerve cells, which are specialised cells that carry information in form of electrical impulse; action potentials
• the speed of action in the nervous system is fast
• the nature of message in the nervous system are electrical impulses
• the duration of response in the nervous system lasts a few seconds
• the area of response in the nervous system is localised
• the nervous system controls things like reflexes (e.g. blinking)