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Nervous System The two major subdivisions of the nervous system are the central nervous system and the peripheral nervous system The CNS consists of the brain and the spinal cord its responsible for integrating processing and coordinating sensory data and motor commands The CNS integrates balance and limb position and coordinates your recovery by commanding the appropriate skeletal muscles The CNS is also the seat of higher learning performing functions as intelligence memory learning and emotion The PNS includes all the neural tissue outside the CNS The PNS carries motor commands to the peripheral tissues and systems Nerve fibers called axons carry sensory information and motor commands in the PNS Sketch and label the structure of a typical neuron and describe the function of each The soma consists of the cell body of a neuron which further contains the nucleus Glial cells interact with neurons and regulate the extracellular environment protect against pathogens and repair damaged neural tissue Axons are-capable of propagating nerve impulses Dendrites respond to specific stimuli in the extracellular environment Synapse terminals communicate information from the presynaptic cell to the posisynaptic cell Structural Classification Anaxonic neurons- have multiple processes and the axon is indistinguishable from the from the dendrites Theyre fairly small Bipolar neurons- have two processes in which one is a dendrite and the other an axon The dendrite is distinguishable from its extensive branching at its distal end its less than 3Omm from tip to tip Unipolar neurons- have a continuous dendritic and axonal process in which case the cell body lies off to the side The dendritic end of the process has extensive branching the anoxic part of the process may extend to be
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