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15-1 Nervous System
Science
Term | Definition |
---|---|
Stimulus | A change or signal in an organism's surroundings that cause the organism to react |
Response | An action or a change in behavior that occurs in results of stimulus |
Neuron | A cell that carries information through the nervous system |
Nerve Impulse | The message carried by neurons |
Dendrite | A thread like extension of a neuron that carries nerve impulses toward the cell body |
Axon | A thread like extension of a neuron that carries nerve impulses away from the cell body |
Nerve | A bundle of nerve fibers |
Sensory Neuron | A nerve cell that picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulse |
Motor Neuron | A neuron that sends an impulse to a muscle or gland, causing the muscle or gland to react |
Interneuron | A neuron that carries nerve impulses from one neuron to another |
Synapse | The junction where one neuron can transfer an impulse to the next structure |