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Nervous System

TermDefinition
homeostasis regulation of an organism's internal, life-sustaining conditions
neuron basic functioning unit of the nervous system; made up of a cell body, dendrites, and axons
axon neuron structure that carries messages away from the cell body
dendrite neuron structure that receives messages and sends them to the cell body
synapse small space across which an impulse moves from an axon to the dendrites or cell body of another neuron
central nervous system division of the nervous system, made up of the brain and spinal cord
peripheral nervous system division of the nervous system, made up of all the nerves outside the Central Nervous System, connects the brain and spinal cord to other body parts
cerebrum largest part of the brain, where memory is stored, movements are controlled, and impulses from the senses are interpreted
cerebellum part of the brain that controls voluntary muscle movements,maintains muscle tone, and helps maintain balance
brain stem connects the brain to the spinal cord and is made up of the midbrain, the pons, and the medulla
reflex simple innate behavior, such as yawning or blinking, that is an automatic response and does not involve a message to the brain; automatic, involuntary response to a stimulus; controlled by the spinal cord
retina light-sensitive tissue at the back of the eye; contains rods and cones
cochlea fluid-filled structure in the ear in which sound vibrations are converted into nerve impulses that are sent to the brain
olfactory cell nasal nerve cell that becomes stimulated by molecules in the air and sends impulses to the brain for interpretation of odors
taste bud major sensory receptor on the tongue; contains taste hairs that send impulses to the brain for interpretation of tastes
Created by: MsHollinger