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The Action Potential

Bozeman Science Follow
  • Video description
  • 6 years ago
  • 540,148 views
  • 9,813 likes
  • 411 comments
In this video Paul Andersen details the action potential in neurons. The resting potential of a neuron (-70mV) is maintained through differences in concentration and permeability of Na, K, and Cl ions. A graded potential is created as neurotransmitters from adjacent cells that are either excitatory or inhibitory. If the neuron reaches the threshold of -55mV an opening of voltage-gated sodium channels triggers an action potential that may affect other connected neurons.

PhET neuron simulation - https://phet.colorado.edu/en/simulation/neuron

Music Attribution

Intro
Title: I4dsong_loop_main.wav
Artist: CosmicD
Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/
Creative Commons Atribution License

Outro
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory

All of the images are licensed under creative commons and public domain licensing:
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Helixitta. (2015). Українська: Переклад англійською File:Propagation of action potential along myelinated nerve fiber.png. Retrieved from https://commons.wikimedia.org/wiki/File:Propagation_of_action_potential_along_myelinated_nerve_fiber_en.svg
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LadyofHats. (2007). English: Complete neuron cell diagram. Neurons (also known as neurones and nerve cells) are electrically excitable cells in the nervous system that process and transmit information. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves. Retrieved from https://commons.wikimedia.org/wiki/File:Complete_neuron_cell_diagram_en.svg
OpenStax. (2016a). Version 8.25 from the Textbook. Retrieved from https://commons.wikimedia.org/wiki/File:1221_Action_Potential.jpg
OpenStax. (2016b). Version 8.25 from the Textbook. Retrieved from https://commons.wikimedia.org/wiki/File:1224_Post_Synaptic_Potential_Summation.jpg
OpenStax. (2016c). Version 8.25 from the Textbook. Retrieved from https://commons.wikimedia.org/wiki/File:1224_Post_Synaptic_Potential_Summation.jpg
section, S. user in the "File history". (See the date of the upload in the “File history” section.). This image (basic representation of banana) has been created as part of the WikiVoc Project and released under Public Domain license. These illustrations can be used for various purposes, such as language dictionaries, flash cards, etc. Other such images can be found in the WikiVoc images category. Anyone can assist us in this project, so please help us out. Retrieved from https://commons.wikimedia.org/wiki/File:WikiVoc-banana.svg
Wikipedia, Q. J. at E. (2009). English: Recreated :File:Neuron-no labels2.png in Inkscape and hand-tuned to reduce filesize. Created by Quasar (talk) 19:59, 11 August 2009 (UTC). Retrieved from https://commons.wikimedia.org/wiki/File:Neuron_Hand-tuned.svg
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