1. Nerve Impulses

3. Membrane Potential = difference in electrical charges between inside & outside of neuron

4. http://highered. mheducation

5. Stages of nerve impulse
Resting Stage = nothing happening
Depolarization = reversal of charges by Na+ moving in
Repolarization = restoring the charges by K+ moving out
Sodium/Potassium Pump = restores the resting stage by pumping Na+ back out and K+ back in
(Action Potential = depolarization + repolarization)

6. Threshold = minimum level of outside stimulus needed to initiate a nerve impulse

7. Action Potential = nerve impulse = depolarization + repolarization = reversal + restoration of charges

8. Saltatory conduction = impulse “jumps” from node to node (Na+ and K+ gates only at nodes) ~Saltare = latin for “hop” ~Only occurs in neurons with a myelin sheath. ~Makes nerve impulse faster!

9. Nerve Impulse across a synapse (gap between 2 neurons) http://highered

11. Examples of neurotransmitters