Nerve Tissue - Nerve Tissue Neuroglial cells outnumber neurons 10 to 1 are nerve glue take care of fragile neurons little CT and matrix in nerve

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Nerve Tissue Neuroglial cells outnumber neurons 10 to 1, are nerve glue, take care of fragile neurons little CT and matrix in nerve tissue, neuroglial give structural framework, nutrients, chemical and electrical environment respond to stimuli (excitability) conductivity/(in response to stimuli) secretion (translate elec. signals to chem. signals by releasing neurotransmitters) nerve cells need oxygen and can only use glucose to make ATP which is highly vascularized, collect and send info. Dendrites: cytoplasmic extensions as few as 1 to tens of thousands (info. collection), produce grated elec. signals designed for short dist. and have chem. and mech. gated channels Some: aka cell body, ferricarrion, find all cell organelles (mitochondria, rough/smooth er) and most neurons don’t have centrioles (amitotic so why would they need centrioles), single nucleus very rounded, nissl bodies are accumulations of rough er and picks up hematoxylin to stain bright blue or bright purple, find big golgi apparatus surrounding nucleus Axon carries electrical signals away from cell body w. action potential (voltage gated channels) axon hillock trigger zone where you trigger action potential high
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This note was uploaded on 02/21/2012 for the course BIO 89515 taught by Professor Janmachart during the Fall '09 term at University of Texas at Austin.

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Nerve Tissue - Nerve Tissue Neuroglial cells outnumber neurons 10 to 1 are nerve glue take care of fragile neurons little CT and matrix in nerve

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