5 Psych 15 Cellular and Chemical - Cells of the Nervous...

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Cells of the Nervous System I. Neurons —Interneuronal Communication of Information A. Types of Neurons 1. number of processes— unipolar , bipolar , multipolar 2. function— sensory versus motor , relay versus interneuron
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Cell body Dendrites Dendrite Dendrites Axon B. The Three Main Parts of the Neuron Manufactures needed materials Receive messages Sends messages
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Nucleus Ribosomes Golgi Complex Microtubules Mitochondria C. The Inside Parts of the Neuron Contains DNA Site of protein synthesis Aerobic energy release Packages products in vesicles Matrix
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microtubules, neurofilaments, microfilaments The Cytoskeleton structure, transport, memory, consciousness Cajal, 1909
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D. The Axon Terminal Microtubules transport vesicles Vesicles fuse to membrane and release neuro- transmitter molecules into synapse :: :: :: :: :: :: :: :: :: :: :: :: :: ::
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II. Glia--support cells A. Myelin formed by oligodendrocytes (CNS) and Schwann cells (PNS) B. Injury produces reaction by astrocytes C. Blood brain barrier formed by astrocytes
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The Blood Brain Barrier Astrocytes contact blood vessels and protect brain from many substances.
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