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Science Ch 21

Terms

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

Deck Info

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