26tissues2 (1) - Lecture 26: Tissues II Chapter 4: Nervous...

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Lecture 26: Tissues II Chapter 4: Nervous and Epithelial Tissue
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The Big Picture What types of tissues are in the human body? What do they look like ? What are their specific functions ? How do they interact ? Nervous Tissue and Epithelial Tissue
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Nervous Tissue Our nervous system (organ system) performs three basic functions: 1.) Sensory Input 2.) Data Integration 3.) Motor Output
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1.) Sensory Input Internal (organ) or external (skin) sensory receptors receive a signal E.g. your hand becomes hot over an open flame
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Nerve Impulses Nerves in your hand pass the message up nerves in your arm All nerves eventually connect to the spinal cord and travel to the brain as a processing plant
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2.) Data Integration All sensation (feeling) occurs in the brain Brain receives messages sent via neurons Interprets signals and converts information into sensation (heat, pain, etc…)
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3.) Motor Output Brain sends interpreted message out into a part of the body in response to stimuli E.g. moves hand away from damaging flame Whole process occurs in just milliseconds !
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Nervous Tissue Components 2 components of our nervous tissue are: 1.) nerve cells (neurons) 2.) neuroglia
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Neuron Structure Neural cells ( neurons ) have 3 parts: 1.) dendrites 2.) cell body 3.) axon 1 2 3
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This note was uploaded on 12/08/2011 for the course PRE-HEALTH 1160 taught by Professor L.miani during the Spring '11 term at Niagara College.

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26tissues2 (1) - Lecture 26: Tissues II Chapter 4: Nervous...

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