nervous system Flashcards
What is the nervous system?
Specialised network of cells, primary internal communication system
What are the two main functions of the nervous system?
Collect process and respond to environmental information
Coordinate working of different organs and cells
What sub systems is the nervous system divided into?
Central nervous system
Peripheral nervous system
What is the CNS made up of?
Brain
Spinal cord
What is the brain?
Centre of conscious awareness
Cerebral cortex distinguishes us from animals
Two hemispheres
What is the spinal cord?
Extension of brain
Responsible for reflex actions
What does the CNS do?
Origin of commands
Passes messages from brain
What is the PNS?
Transmits messages via neurons to and from CNS
What is the PNS divided into?
Autonomic nervous system
Somatic nervous system
What is the ANS?
Governs vital functions like heart and breathing rate
What is the SNS?
Controls muscle movement and receives information from sensory receptors
