neurons neurons and neuroglia (multiple sclerosis and neuroglia) where are neurons in the body?...
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![Page 1: Neurons Neurons and neuroglia (multiple sclerosis and neuroglia) Where are neurons in the body? Types of neurons and their functions How do neurons work?](https://reader036.vdocuments.mx/reader036/viewer/2022081501/56649d405503460f94a1a1a1/html5/thumbnails/1.jpg)
Neurons• Neurons and neuroglia
(multiple sclerosis and neuroglia)
• Where are neurons in the body?
• Types of neurons and their functions
• How do neurons work?– Action potentials– Synapses
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The Basics of a Neuron
• Cell body with nucleus
• Axon (carries electrical message)– Note Schwann
cells
• Dendrites (bring stimulus to cell body)
• Axonal terminus
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Neurons and neuroglial cells
• Axon in peripheral nervous system with myelin sheeth formed by Schwann cells
• Provides for insulation and allows for saltatory propagation of action potentials
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Neuroglial cells in CNS
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Neuroglial cells in CNS
• Astrocytes– Most abundant and versatile– Control chemical environment around neurons– Also signal among themselves with slow chemical signals
• Microglia– Monitor health of neurons and transform into immune
macrophages (normal immune cells have no access to CNS)• Ependymal cells
– Line cavities of brain/CNS– Barrier between CFS and tissue fluid– Cilia beat to move CFS
• Oligodendrocytes– Myelin sheaths in CNS
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Types of Neurons--structural classes
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Types of Neurons—where in body
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Types of neurons--examples
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How do neurons work—action potentials
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Measuring membrane potential
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Diffusion and action potential
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Saltatory conduction and role of Schwann cells
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What happens at the end—chemical synapse
• Neuro-muscular junction is synapse between motor unit and muscle cell (motor unit)