nervoussystempzWEBCTFALL2007

nervoussystempzWEBCTFALL2007 - Introduction...

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Introduction Coordinates/controls bodily activities along with the endocrine system. Divisions:   1.   Central Nervous System (CNS) Brain and Spinal Cord 2. Peripheral Nervous System (PNS) All parts of nervous system lying outside CNS   
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A. Neuron Structural/functional unit of  nervous system Conducts nerve impulses  (action potentials) 1.  Properties   Types Sensory Neurons:    Conduct sensory info  from a peripheral body  part to CNS   Introduction
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Interneurons:    Conduct info within the CNS Motor Neurons:    Conduct motor info from the CNS to a  peripheral body part
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1. Structure Dendrites Receive stimulus Short Branch all along  length Multiple   Cell Body Nucleus and most  organelles located  here  
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Axon Conducts AP away  from cell body Single Long    Branching only at  end
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(a)Myelinated Neurons Axon insulated by    myelin  In PNS Myelin formed by  Schwann cells In CNS Myelin formed by  Oligodendrocytes  Conduct impulses at  faster rate than  nonmyelinated axons PNS
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1. Nerves
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This note was uploaded on 04/26/2008 for the course BIO 1504 taught by Professor Williamson during the Fall '07 term at Mississippi State.

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nervoussystempzWEBCTFALL2007 - Introduction...

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