dendrites axon nucleus cell myelin sheath axon terminals

26
You Have Some Nerve

Upload: brianna-owens

Post on 06-Jan-2018

263 views

Category:

Documents


2 download

DESCRIPTION

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

TRANSCRIPT

Page 1: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

You Have Some Nerve

Page 2: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Dendrites

Cell

Axon

Axon Terminals

Myelin Sheath

Nucleus

Page 3: 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

Page 4: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

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

Page 5: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

SynapsesConsist of 3 Parts: 1. Presynaptic ending – made up of neurotransmitters

at the Axon Terminal that transmit information2. Postsynaptic ending – made up of receptor sites

that receive the information in the Dendrites3. Synaptic Gap – small gap between the Axon

Terminal and the Dendrite through which the electrical impulses are transmitted

Page 6: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Presynaptic Neuron

Lots of chemical activity

Post Synaptic Neuron

Page 7: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

NeurotransmittersKind of boring, but it will help this make a little bit more sense

https://www.youtube.com/watch?v=p5zFgT4aofA

Page 8: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Th Action Potential

Page 9: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

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

Page 10: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Th Action Potential

Page 11: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Th Action Potential

Page 12: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Th Action Potential

Page 13: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Th Action Potential

Page 14: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Axon Terminals

Dendrites

Page 15: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Axon Terminals

DendritesNeurotransmitter

Receptor

Page 16: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

TerminalButtons

Dendrites

Neurotransmitter

Receptor

Page 17: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

TerminalButtons

DendritesExcitatory: Continue the action potential

Page 18: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

AxonTerminals

Dendrites

Inhibitory: End the action potential

Page 19: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

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

Page 20: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Both kinds received at once

Excitatory has to pass a certain threshold to create an Action potential

Excitatory or Inhibitory?

Page 21: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals
Page 22: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Neurotransmitters

AcetylcholinePresent 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

Page 23: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Neurotransmitters

BOTOX

Page 24: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

BOTOX

Inhibits

Acetylcholine

Page 25: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals

Acetylcholine is the

neurotransmitter, which, when

abundant in our muscle synapses,

control muscle movement

BOTOX

keeps acetylcholine out of the synapse

So the muscles that cause

wrinkles are temporarily paralyzed

Page 26: Dendrites Axon Nucleus Cell Myelin Sheath Axon Terminals