You Have Some Nerve

Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

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

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

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

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

Neurotransmitters Kind of boring, but it will help this make a little bit more sense https://www.youtube.com/watch?v=p5zFgT4aofA

Th Action Potential

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

Th Action Potential

Th Action Potential

Th Action Potential

Th Action Potential

Dendrites Axon Terminals

Neurotransmitter Dendrites Axon Terminals Receptor

Dendrites Terminal Buttons Neurotransmitter Receptor

Excitatory: Continue the action potential Dendrites Terminal Buttons

Dendrites Axon Terminals Inhibitory: End the action potential

A Good Explanation of Neurotransmitters https://www.youtube.com/watch?v=ukFjH9odsXw

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

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

Neurotransmitters BOTOX

BOTOX Inhibits Acetylcholine

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