Nervous System Communication. Kid Concussions In The News. Neurons . Nerve cells Parts of neurons Cell body Long extensions (fibers=dendrites or axons) Message = nerve impulse. Animal Nervous Systems. Sponges – no nervous system Other animals all have neurons in systems. Nerve Net.
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level of activity) some have
(such as dopamine, norepinephrine, serotonin)
some are strictly sensory or motor, some are mixed.
In specific parts of the brain