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The Nervous System

Signals called impulses are sent through stimulichemicalnervespinal cordSelect your answer cells. These impulses flash along dendritesglandsneuronschemicalSelect your answer. Neurons contain three parts: neuronsdendritesspinal cordglandsSelect your answer, a cell body, and an axon. Impulses can race at speeds of up to spinal cord120foodnerveSelect your answer meters per second. The gap between neurons is a fraction of an inch wide. The axon releases nervefoodchemicalstimuliSelect your answer droplets, which connect the neurons. Sensory neurons collect information from stimuliglandsdendritesneuronsSelect your answer and send it to the brain and nervedendritesspinal cordneuronsSelect your answer. Motor neurons carry commands to the dendritesglandsspinal cordnerveSelect your answer and muscles. Others help transport foodglandschemicaldendritesSelect your answer through the intestines and speed up the heartbeat. Associative neurons stimulipassfoodnerveSelect your answer impulses from sensory to motor neurons.