The Action Potential Where Does That Ion Go? A Video 2 days ago   14:07

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Bozeman Science
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

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1280px-Muscle_Tissue_(1).svg.png (1280×960). (n.d.). Retrieved December 13, 2016, from https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Muscle_Tissue_(1).svg/1280px-Muscle_Tissue_(1).svg.png
Dirgxtreme. (2015). English: reflex loop signal. Retrieved from https://commons.wikimedia.org/wiki/File:Reflex_arc_signal.jpg
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
holder, L. (2011). English: A 9V, AA, AAA, AAAA battery in close proximity for comparisisation porpoises. Retrieved from https://commons.wikimedia.org/wiki/File:AAAA_AAA_AA_9V_comparison-1.jpg
Indolences. (2007). Image:Traffic lights 3 states.png. Retrieved from https://commons.wikimedia.org/wiki/File:Traffic_lights_3_states.svg
Jana, D. (2016). English: Myelinated neurons are faster than unmyelinated neurons because of Saltatory motion. Retrieved from https://commons.wikimedia.org/wiki/File:Saltatory_Conduction.gif
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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Comments 467 Comments

Daniel Hain
puts my prof to shame
butterNpants
Thank you for this! that salty banana is actually really helpful in understanding this.
Jayno Apat
Thank God for this video ❤️
Izra
that was helpful
THANKS
annch592
You are an excellent instructor!
Bighit Staff
Isn't -90 for neurons? -70 is for muscle cells.
BZ Humor
It was very helpful, amazing explanation :)
Anél Naudé
Very helpful
cait
I’m doing a major in neuroscience and you’re still saving my butt. You are a god send. I’ve never found anyone that explains things and clearly and concisely as you. Also, salty banana? Perfect.
mia medrano
thank you!!!
Lily Taylor
Thank you very much for your great explanation. Your videos are the reason I continue to have an A in physiology.
Shajini Sujaharan
Thank you very much. I understood the whole concept now.
Isaac Siegel
Daddy Bozeman back at it again.
Angelo Aguilar
You did this in 14 mins. Hands down
Dylan Fletcher
Dam Bro I love you
Thank you soso much
Dahabe YUSSUF
This is so much better than the class lecture.
Ha Qa
Angie Dimitrov
I would take a bullet for this man
DanceMusic
this is amazing
harshit yadav
this is AMAZING
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Where Does That Ion Go? A Video The Action Potential 2 days ago   05:12

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Cynthia Miller. Where Does That Ion Go? A Video of the Cardiomyocyte Action Potential: Part 1. APS Archive of Teaching Resources, http:--www.apsarchive.org-resource.cfm?submissionID=6043 March 8, 2012.
Description: Students often have great difficulty understanding cardiac physiology, particularly the cardiomyocyte action potential. With multiple ions moving through different channels at various points in time, it can be challenging to present the material in a cohesive fashion. This led to the creation of multimedia videos that examine the physiology of this complex process. The first video begins with a description of the resting membrane potential of a cardiomyocyte (a cardiac muscle cell). Topics include the sodium-potassium pump, calcium pump, and leak channels. The second video continues on to examine the phases of an action potential, including depolarization, the plateau, and repolarization. Current research shows that these videos have improved student scores on examinations, particularly of at-risk students, and have been favorably evaluated by students.

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