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Bio 260 Nervous System

Bio 260 Nervous System - Objectives Bone tissue Skeletal...

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Objectives: Bone tissue Skeletal system Joints Muscle system Muscle tissue Nervous tissue Exam 2: W, Oct 15, 2008
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Nerve axon Muscle Location? Space?
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Nervous Tissue Functions Responsiveness Learning Memory Personality Coordination Two divisions Central nervous system (CNS) Peripheral nervous system (PNS)
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Nervous Tissue Two cell types Neuroglia & Neurons Neuroglia “Glia” Do not transmit nerve impulse (AP) Support, nutrients, ion flow, defense & insulation Compare to neurons Size Shape Function
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Nervous tissue Neurons “Nerve cells” Bundles = nerves Transmit nerve impulse (AP) Parts Soma Neurites Axons Dendrites Functional classification Sensory, Inter neuron, Motoneuron
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Neuron components Node of ranvier Dendrites Glia Myelin Nucleus Cell body Axon Node Myelin Dendrites Nucleus Cell body Glia Axon
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Nerve: bundle of neurons
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Responsiveness
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Myelin sheath Lipid From neuroglia Wraps tightly
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