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

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 -

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Title: I4dsong_loop_main.wav
Artist: CosmicD
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Title: String Theory
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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

Comments 467 Comments

Daniel Hain
puts my prof to shame
Thank you for this! that salty banana is actually really helpful in understanding this.
Jayno Apat
Thank God for this video ❤️
that was helpful
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
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
This is so much better than the class lecture.
Ha Qa
Angie Dimitrov
I would take a bullet for this man
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

Cynthia Miller. Where Does That Ion Go? A Video of the Cardiomyocyte Action Potential: Part 1. APS Archive of Teaching Resources, 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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