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28 Cards in this Set

  • Front
  • Back
function of nervous system
master regulatory system that coordinates body function
3 functional types of neurons
sensory input, integration, motor output
describe sensory input
info detected by sensory receptors
describe integration
sensory input is processed and interpreted
motor output
response is made by organs
give example
red light
see-sensory input
nervous system integrates this info(red light means stop
send motor output to leg-btake
whate system works with nervous system to regulate
endocrine
how is nervous system organized
structural
functional
what is structural classification
cns-brain and spinal cord
pns(peripheral)- nerves that extend from brain and spinal cord (cranial and spinal nerves)
what is functional classification
sensory or afferent division- nerve fiber conveys ompulses TO cns from sensory receptors
motor or efferent division-- carries impilses FROM cns to muscles and glands
somatic nervous system
volntary
autonomic
involuntary
what kind of signals do cells of nervous system use
electrochemical
how do cells of nervous system react
rapid
specific
immediate response
what are 2 types of cells
neuron and neurological
what are neuron cells
principle type, transmit and are generic
neurological cells
variety of other types
provides insulation, support, nourishment for neurons
what are nerve impulses
electrochemical signals
what are parts of neuron
cell body
dendriteinput receives signals
axon output transmit signals
nerve fibers axon&dendrite
nerve-bundle of fibers
what is axon terminal
releases neurotransmitter info
flows in one direction
myelin sheath
elec insulation around axon
myelin
lipid substance in cell membrane in some neurological cells
schwann cells
neurological cells in PNS that wrap around axon. they form myelin sheath
nodes of ranvier
gap between schwann cells
structural types of neurons
mulitpolar, bipolar,
unipolar
multipolar
1 axon and many dendrites-most common
bipolar
1 axon 1 dendrite found in specialized area of eyes ears nose
unipolar
1 nerve fiber extends from cell body and splits
1 branch comes from periphery and acts as dendrite
other brsanch runs toward cns acts as axon
found in ganglia(PNS)