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Cream of the Crop 20
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Cream of the Crop 20 (Terry Blount) (1996).iso
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NERVOUS.DAT
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1994-09-18
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neuron nerve cell that carries a message
impulse the message that a nerve cell carries
involuntary not consciously controlled
voluntary consciously controlled
meninges membranes around the brain
sensory neuron carries a message from a sense structure to the CNS
CNS central nervous system - brain and spinal cord
motor neuron carries a message from the CNS to a muscle or gland
interneuron connect a sensory and a motor neuron
cell body large part of neuron that contains nucleus and cytoplasm
dendrite cell part that carries message toward cell body
axon neuron cell part that carries message away from cell body
axon terminal end of axon
rest potential charge setup in a neuron that is not carrying an impulse
action potent. depolarization and repolarization of a neuron
depolarization reversal of the resting potential charge setup
repolarization recreation of the resting potential charge setup
myelin lipid/protein covering that insulates axons
synapse the junction between one neuron and the next
neurotransmittera chemical that carries the nerve message across a synapse
receptor the sense organ
effector a muscle or gland that responds
peripheral NS nerves that are not part of the brain and spinal cord
cerebrum part of brain involved in complex or conscious thinking
hemisphere left or right side of the brain
lobe clear region of the brain delineated by fissures
cerebral cortex gray matter in outer surface of cerebrum
cerebellum part of brain at base of skull; involved in coordination
brainstem midbrain; pons; and medulla
medulla lowest part of brainstem - breathing; heart; blood pressure
pons a bridge to higher levels of the nervous system
thalamus serves as a sort of switching station for sense messages
hypothalamus center for hunger; thirst; anger; appetites
reflex quick response not requiring brain involvement
sympathetic NS responds to prepare body for stress
parasympathetic responds to bring body to state of normalcy
autonomic NS controls activities that we do not consciously control
sclera outer layer of the eye
cornea clear portion of the sclera at the front of the eye
choroid middle layer of eye that reduces internal reflection
iris colored portion of choroid layer at front of eye
aqueous humor thin fluid just behind the cornea
vitreous humor thick fluid found behind the lens
rod cell especially sensitive to dim light
cone cell sensitive to color
stirrup (stapes)tiny bone in middle ear next to oval window
hammer (malleus)tiny bone in middle ear next to eardrum
anvil (incus) tiny bone in middle ear between hammer and stapes
semicircular canals that help to determine body motion and position
cochlea snail-like structure containing end of auditory nerves
auditory nerve carries message from a sound to the brain