22 terms

6th Grade Science Nervous System

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axon
long fiber that carries impulses away from the cell body of a neuron
cell
the basic structural and functional unit of all organisms
cerebellum
the "little brain" attached to the rear of the brainstem; it helps coordinate voluntary movement and balance
cerebrum
large part of the brain that controls the senses and thinking
dendrite
short fiber that conducts toward the cell body of the neuron
spinal cord
a column of nerves within the spine that transmits messages to and from the brain
stimulus
a signal to which an organism responds
neurons
nerve cells
nerve
a bundle of nerve fibers.
response
an action or change in behavior that occurs as a result of a stimulus
sensory neuron
nerve cell that carries information from the environment to the central nervous system
interneuron
A nerve cell that relays messages between nerve cells, especially in the brain and spinal cord
motor neuron
A neuron that sends an impulse to a muscle or gland, causing the muscle or gland to react
synapse
space between neurons
nerve impulse
the message that a neuron carries
Central Nervous System
The brain and spinal cord
Peripheral Nervous System
the sensory and motor neurons that connect the central nervous system to the rest of the body
brain
The part of the central nervous system that is located in the skull and controls most functions in the body
brainstem
connects brain to spine. basic survival functions
Autonomic Nervous System
the part of the nervous system that controls involuntary actions of the heart and glands
reflex
involuntary response to a stimulus
concussion
injury to the brain caused by a blow