Card Set Information
Psychology chp7 CNS PNS
Nervous system, central and peripheral nervous system.
What are the functions of the PNS?
To transmit sensory information from the body, organs and glands to the CNS
To send motor messages from the spinal cord to appropriate body parts via motor neurons
What is the CNS?
Consists of the brain and the spinal cord
sensory information from internal and external environment and
Conveys messages to the body and vice versa through the PNS
What are the functions of the spinal cord?
Receives sensory information from the PNS and transmits it to the brain
Transmits motor messages from the brain to the PNS
Describe the Somatic nervous system
Controls voluntary movement via control of skeletal muscles
Transmits sensory information inwards towards the spinal cord
Transmits motor messages outwards from the spinal cord to appropriate body parts
Describe the Autonomic nervous system
internal bodily functions
activity of internal, muscles and organs
What is the role of the sympathetic nervous system?
the body during times of stress or need for increased physical activity
Triggers fight-flight response
What is the role of the parasympathetic nervous system?
Calms the body and
returns internal systems to calm levels
of activity when stress or the need for physical activity disappears
Responsible for maintaining the stability of normal bodily functioning (
Responses due to the fight or flight response
High levels of adrenaline
Increased heart rate and blood pressure
Increased respiration rate
What is the fight of flight response?
A state of
that prepares or mobilises the body to confront a situation (fight) or flee from the situation (flight)