ANP 300 - Lecture 10 - Nervous Tissue

ANP 300 - Lecture 10 - Nervous Tissue - NERVOUS TISSUE...

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NERVOUS TISSUE
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Should You Care About Anatomy?
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Should You Care About Anatomy?
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Should You Care About Anatomy? YES
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Nervous System Communicative control and coordination of different organ systems
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Nervous System Function - Sensory Activity - Integrative Activity - Motor Activity
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Nervous System Structure - CNS - PNS
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Nervous System Functional Unit - Neuron Properties of Excitability & Conductivity
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Neuron Structure Dendrites Cell Body Axon Synaptic Terminals
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Neuron Myelination Neurolemmocyte (Schwann Cell) Neurofibril Node (Node of Ranvier) 1 mm (Neuroglia)
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Neuron Myelination Neurolemmocyte (Schwann Cell)
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Neuron Conduction (Myelinated) Saltatory Conduction 130 meters / second
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Neuron Conduction (Unmyelinated) Continuous Conduction 0.5 meter / second
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Neuron Conduction (Mechanism) - Triggers an “All or None” response - Threshold stimulus on dendrite causes depolarization (fire) - Depolarization of adjacent area along plasma membrane (impulse) - Synaptic knobs release neurotransmitter (synapse)
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Neuron Conduction (Mechanism) - Impulse travels only in ONE direction
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ANP 300 - Lecture 10 - Nervous Tissue - NERVOUS TISSUE...

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