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20 Cards in this Set

  • Front
  • Back
Neuron
cell,moves electrical enrgy
Impulse
electrical message,passes on nureon
Receptor
cell,detects changes in and out of the body
Nerve
bundle of axon,blood vessels and connective tissue
brain
mass of tissue, main organ of the nervous system
reflex
involuntary response to a stimulus
cerebellum
part of the brain that keeps track of the bodys position
cerebrum
the part of the brain that detects sensory perseption, keeps track of voluntary acts
medulla
part of the brain that connects to the spinal cord and controls many involuntary proccesses
axon
long cell fiber, transfers intercellular messages
dendrite
short branched extension of a neuron, recivies impulses from other cells
motor neuron
sends impulses from the brain and spinal cord to other systems
sensory neuron
gathers information about what is happening in and around the body and sends on to central nervous system
retina
layer of light sensitive cells in back of the eye
rods
photoreceptors that detect very dim light
cones
photoreceptors that detect bright light and help you see colors
iris
colored part of the eye
cochlea
ear organ converts sound waves into dectrical impulses
lens
curved transparent object forms an image by refracting light
olfactory cells
smelling cell