periheral nervous system Flashcards
define peripheral nervous system
made up of the ganglia outside the braina nd the spinal cord that communicates messages from the CNS
what are the two sub divisions of the PNS
- atonomic
- somatic
define autonomic
responsible for communication between the vasuclar muscles and the internal organs such as heart rate, digestion and respirtaory rate
what are the two sub divisions of atonomic
- sympathetic
- parasympathetic
define sympathetic
a sub division of the autonomic PNS that dominates when under stress/threats
define parasympathetic
a sub division of the autonomic PNS that maintains energy levels for normal bodily functions
Define somatic
The somatic nervous system is the part of the PNS that has velentary control over body movenments via skeletal muscles
what are the two sub divisions of somatic
- sensory neurons
- motor neurons
define sensory neurons
receives sensory information form recpeptors (eyes and skin) and sends it to the CNS
define motor neuron
receive information from the CNS and sends to the skelatal muscles to be able to coordinate the releveant responce