0. You Have Some Nerve

1. Dendrites
Axon
Nucleus
Cell
Myelin Sheath
Axon Terminals

2. Neuron – long, thin cells of nerve tissue that transfer messages to and from the brain
Axon – aka “nerve fiber,” transfer the electrical impulses away from cell body
Dendrite – short, branch-like extension of the nerve cell that receive impulses from other cells
Myelin sheath – Casing of electrically insulated protection around the axon
Axon Terminal – small projection from the nerve cell that sends out information to other cells

3. Synapse
Synapse – a small gap between one cell’s axon terminal and another cell’s dendrite through which the electrical impulses that pass through the brain are passed

4. Synapses Consist of 3 Parts:
Presynaptic ending – made up of neurotransmitters at the Axon Terminal that transmit information
Postsynaptic ending – made up of receptor sites that receive the information in the Dendrites
Synaptic Gap – small gap between the Axon Terminal and the Dendrite through which the electrical impulses are transmitted

5. Lots of chemical activity
Presynaptic Neuron
Lots of chemical activity
Post Synaptic Neuron

6. Neurotransmitters
Kind of boring, but it will help this make a little bit more sense

7. Th Action Potential

8. Action Potential
Action Potential – the explosion of electrical impulse that fires down the axon away from the cell body and to the neurotransmitters

9. Th Action Potential

10. Th Action Potential

11. Th Action Potential

12. Th Action Potential

13. Dendrites
Axon Terminals

14. Neurotransmitter
Dendrites
Axon Terminals
Receptor

15. Dendrites
Terminal
Buttons
Neurotransmitter
Receptor

16. Excitatory: Continue the action potential Dendrites
Terminal
Buttons

17. Dendrites
Axon
Terminals
Inhibitory: End the action potential

18. A Good Explanation of Neurotransmitters

19. Excitatory or Inhibitory?
Both kinds received at once
Excitatory has to pass a certain threshold to create an Action potential

21. Neurotransmitters Acetylcholine
Present in the synapses in the nerves at our muscles.
More Acetycholine in the synapse: Binds with receptors at the dendrite to effect an action potential, and thus, create muscle movement
Less acetylcholine in the synapse: no action potentials...no muscle movement

22. Neurotransmitters
BOTOX

23. BOTOX
Inhibits
Acetylcholine

24. keeps acetylcholine out of the synapse
BOTOX
keeps acetylcholine out of the synapse
So the muscles that cause wrinkles are temporarily paralyzed
Acetylcholine is the neurotransmitter, which, when abundant in our muscle synapses, control muscle movement