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Nervous Sys. Voc Review

Across
carry messages from CNS
with nucleus – nucleus & most of cytoplasm
between sensory & motor neurons in the CNS
bring messages to CNS
Chemicals in the junction which allow impulses to be started in the second neuron
Made up of brain and spinal cord; Acts as body’s control center, coordinates body’s activities
Relays information from and to skin and skeletal muscles
reacts to a stimulus
small gap or space between the axon of one neuron and the dendrite of another
Control organs in time of stress
Down
fiber which carries impulses away from cell body
Made up of all the nerves that carry messages to and from the central nervous system
dense lipid layer which insulates the axon – makes the axon look gray
receive stimulus and carries it impulses toward the cell body
initiated and completed at the spinal cord level. Occur without the involvement of higher brain centers
a change in the environment with sufficient strength to initiate a response
Relays information to internal organs
cells which produce myelin or fat layer in the Peripheral Nervous System
Basic functional cell of nervous system
muscle fibers (as in the Hamstring muscle) or glands responds by contracting or secreting a product
Control organs at time of rest