29 terms

Ch. 7 The Nervous System

STUDY
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stimulus
a change or signal in the environment that makes you react
response
your body's reaction to a stimulus
nerve impulse
the message a neuron carries
neuron
nerve cell
axon
the part of the neuron that carries the impulse away from the cell body
bundle of nerve fibers
nerve
dendrite
picks up the nerve impulse and sends it to the cell body
sensory neuron
a neuron that picks up a stimulus
interneuron
a neuron that carries and impulse to another neuron
motor neuron
a neuron that sends an impulse to a muscle or gland
synapse
the place where a neuron transfers and impulse to ANOTHER neuron
central nervous system
the brain and spinal cord
peripheral nervous system
the nerves in your body are part of this
brain
the control center of your body
spinal cord
a column of nerve tissue that links the brain to the peripheral nervous system
cerebrum
the part of your brain in charge of memory
cerebellum
the part of your brain in charge of balance
brain stem
the part of your brain in charge of involuntary actions like breathing and heart beat
somatic nervous system
controls voluntary actions
autonomic nervous system
controls involuntary actions
reflex
an automatic response
concussion
a brain injury
pupil
the opening where light enters the eye
retina
lines the back of the eye
lens
focuses light in the eye
iris
the colored part of the eye
optic nerve
allows the eye to send messages to the brain
hammer, anvil and stirrup
bones in the ear
taste buds
sensory receptors on your tongue