Nervous System - Division Flashcards
How is the nervous system divided
CNS
PNS
what does the CNS contain
brain and spinal cord
what does the CNS have for protection
cranium for the brain
vertebral column for the spinal cord
afferent info
incoming sensory information
PNS to CNS
efferent information
outgoing motor information
CNS to PNS
when info comes from the inside it is
upper motor neuron
when info comes from the outside
lower motor neuron
what does the PNS contant
nerves
ganglia outside CNS
how is the PNS divided by fxn
somatic nervous system
autonomic nervous system
somatic nervous system
under conscious control
innervates skeletal muscle
what does the ANS innervate
cardiac muscle
smooth muscle
glands
what control is the ANS under
involuntary
what are the 3 parts of the ANS
sympathetic
parasympathetic
enteric
sympathetic –> ANS
fight or flight
parasympathetic –> ANS
vegetative activities
enteric –> ANS
regulates to processes of digestion
what does the interplay of the 3 parts of the ANS allow
nervous system to remain balance (homeostasis)
mental processing
regulation of other systems
control of muscles and glands
functional components of nervous system
sensory
motor
what does the sensory component do with info
collects it and then carries it/transmits it to CNS
the sensory component is
afferent
what happens when the info gets to the CNS from the sensory component
takes the info and decides what to do with it
whether or not to use it
what to do as a response
what does the motor component do
delivers the results of the analysis of afferent info away from the CNS to muscles and glands
motor component is
efferent
afferent division of the PNS
transmits action potentials to the CNS
efferent division of the PNS
carries action potentials away from CNS
3 step process of nervous system
sensory
integrative
motor
sensory process
NS senses certain changes (stimuli) both w/in your body and outside your body
integrative process
analyzes sensory info, stores some aspects and makes decisions regarding appropriate behaviors
motor process
NS may respond to stimuli by initiating muscular contractions or glandular secretions
initiates a response
