Action Potential

[Iliketheflatb00bs]

I dont get it, what exactly does this do for the body?

[yewrrmiimuse]

I may pass my exam, thanks to this video !

[vanitavance]

@ramasyean - yes - by way of the sodium-potassium pump

[hmmmmm12]

Thank you for describing this concept intuitively to me using plain and simple English, something that my textbook and a variety of other videos on here were unable to do.

[sh1168]

excellent



[sh1168]

excellent

[carbon0e]

vala

[7Achu7]

how channels open first, during stimulisation? please replay

[7Achu7]

how channels open first, during stimulisation?

[Upyour4ss]

this is gay

[nadiachicago33]

this vid helped me a lot

[Shyn0h]

Very good video, I finally got a picture of the process :D But it left out the after-hyperpolarization!! This is caused by the K+ that flows out a little longer than supposed to, becouse the channels don't close as fast as the Na+ channels. So at a point there is too much negative charge inside the axon, but Na/K pumps restore this.

[xxst3phxx]

is this for a unmyelinated axon?

[Shyn0h]

@xxst3phxx

Myeline can act as an insulator. Where there is myeline around the axon, there cannot pass ions trough the membrane (becouse there is no interstitial fluid underneath the myeline). The AP can, however, still continue by jumping from one node of Ranvier to the next one, becouse at these nodes there is an increased amount of Na and K channels.

I got this straight out of my textbook, so it should answer your question pretty well ;)

[ayoopdog]

I understood this thank you so much

[samvanzeeland]

thanks man you are my hero!!

[DaLoneFreeMarshmallo]

Couldn't get through this, too boring. Found the other videos much better..seems not many people share my opinion :P

[whitey4afc]

cheers man totally did not understand this in my lectures but you made it sound simple!

[MrGamer348]

so when the next signal comes, the potassium goes in and the sodium goes out?

[vanitavance]

@MrGamer348 Actually, the potassium and sodium balance inside & outside the cell is restored very shortly afterward - restoration is required before another impulse can travel down the axon.

[rasmasyean]

@vanitavance Is it restored by active transport?

[BlaiddDrwg2009]

THANK YOU! I was wondering what made it negative/postive and I finally get it! This video is amazing.

[LabLE4]

aaaaaaaaaah finally something worth watching.. i had to watch like 5 videos just to get the concept.. i guess this is the best one so far :)

[ai1888]

So if Na+ ions keep moving in, what will flush them out??

[TeamProdigious]

@ai1888 The use of ATP to force the Na+ ions back out against the gradient as active transport. (Forces them out through pumps powered by ATP)

Hope i helped :)

[ai1888]

@TeamProdigious Yes. Thank you very much :)

[elitebose]

IB Biology

[pnas93]

This helped a lot! Thank you!

[LaSuraya1]

This is brilliant.

[drsnakeeater]

Thank you so much for along time I didn't understand this and I thought that YouTube is just for fun and for learn but now I feel fun bec. I learned from YouTube

[dingel06]

Awesome. I knew youtube wouldn't fail me.

[wrestlemaniack1994]

Tahnk you! I have a test on this stuff tomorrow, and I never understood it untill now!

[supermanthesunny]

awesome! thanks!

[lol7285]

"Like" +++

[GolddiggerCG]

300ft/s that is quickkkk

[TakedaMitsurugi]

Great! Really very good.

It would be better if they represented the sodium and potassium gate opening and closing, but it's still a great video.

[screamscream12345]

thankyouuuuuuuuuuuuuuuuuuuuuuu­uuuuuuuuuuuu

[MrCatalano14]

@blissfullness93 and na/k pump

[cocotre]

Very clear to explain to students. Thanks very much... Patricia from Chile.

[nickel24drums]

tis is vry goooodddddddddddd, thx a lot!

[cam859456]

Hell yes! This helped a lot! Thanks!

[rebfizzle513]

excellent video! thank you!

[gr8girl217]

thank you so much! this was really helpful

[yoiknow]

simple but very clear!thank you~

[K8VR]

thank you soo much it has helped me a lot

[edandstu]

Thanks for posting!! Will be very helpful in explaining the action potential to my class.

[coolx1000]

Very good review of the concept!!!

[dance0dream]

simple, great, awesome. Thanks

[stephiiee]

omg, the simplicity of this video has helped me to understand action potential. Thank you so much for uploading!