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? –Action potentials –Synapses

2. The Basics of a Neuron Cell body with nucleus Axon (carries message) –Note Schwann cells Dendrites (bring stimulus to cell body) Axonal terminus

3. 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

4. Neuroglial cells in CNS

5. 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 CSF and tissue fluid –Cilia beat to move CSF Oligodendrocytes –Myelin sheaths in CNS

6. Types of Neurons--structural classes

7. Types of Neurons—where in body

8. Types of neurons--examples

12. How do neurons work—action potentials

13. Measuring membrane potential

14. Diffusion and action potential

15. Saltatory conduction and role of Schwann cells

16. What happens at the end— chemical synapse Neuro-muscular junction is synapse between motor unit and muscle cell (motor unit)