Divisions of the nervous system Flashcards
What are the two sub-systems the nervous system is divided into?
CNS (central)
PNS (peripheral)
Two main functions of the nervous system?
o To collect, process and respond to information in the environment
o To co-ordinate the working of different organs and cells in the body
Role of the CNS and what is it made up of?
o Brain and spinal cord
o Origin of all complex commands and decisions
o Passes messages to and from the brain and connects nerves to the PNS
Role of the PNS and what it’s divided into?
o Autonomic nervous system - transmits info to and from internal bodily organs, it is autonomic (involuntary), divided into sympathetic and parasympathetic
o Somatic nervous system - transmits info from receptor cells in sense organs to the CNS and receives info from CNS for muscles to act (voluntary)
o Transmits messages via neurones to and from the central nervous system
