1. Slide # 1

2. Slide # 2 Diagram of the Nervous System

3. Slide # 3 Neurons

4. Slide # 4 Axons Thread-like extensions from the cell body Tube-like fibers that carry impulses away from the soma to the dendrites Myelin coating

5. Slide # 5 Multiple Sclerosis MS destroys myelin sheaths of axons This can cause erratic and uncoordinated behavior

6. Slide # 6

7. Slide # 7 Dendrites Short, thin fibers that stick out from the cell body Dendrites receive impulses or messages from other neurons and send them to the cell body

8. Slide # 8 Characteristics of Neurons They cannot replace themselves Damage is permanent Threshold of excitation

9. Slide # 9 The Neuron Connection Synapse junction Neurotransmitters Open chemical “locks” Inhibition

10. Slide # 10 How a Neuron Fires