nervous system Flashcards
sensory input
gathers info and monitors change inside and outside the body
integration
processes and interprets the sensory input and decides if action is needed
motor output
the response action to integrated stimuli (activates the muscles or glands)
CNS (Central Nervous System):
What’s in it
brain and spinal cord
PNS (Peripheral Nervous System)
What’s in it
any nerves (even cranial nerves)
PNS Divisions
Sensory Afferent Division
Motor Efferent Division
Sensory Afferent Division
what carries it to the cns
nerve fibers carry info TO the CNS
(ex: eyes to brain)
Motor Efferent Division
nerve fibers carry info AWAY FROM the CNS (ex: brain to muscle)
types of Motor Efferent Division
Somatic: Voluntary
Autonomic: Involuntary
Types of Autonomic
sympathetic (fight or flight)
parasympathetic
Astrocytes
4 things to remember + CNS or PNS
star shaped cells
brace neurons
barrier between capillaries and neurons
control chemicals in brain
CNS
Microglia…
shape?
spiderlike phagocytes
dispose of debris
CNS
Ependymal Cells
line cavities of brain and spinal cord
cerebral fluid
CNS
Oligodendrocytes
produce meyelin sheath around nerve fibers of CNS
Satellite Cells
protect neuron CELL BODIES
PNS
