Action potential animation

[tenshiato]

This is exactly what I need! Thanks for posting this :)

[utubelover46]

Problem? 3Na 2K

[h1a2n3n4a5h6]

This isnt a very good animation, it doesnt show the sodium potassium pump, and the action potential moves too quickly compared to the sodium intake and potassium output.

[xvsoothsayer]

if you're in high school and learning this, retain it. This is going to come back to get you. 

[alexpm27]

@xvsoothsayer Really? I plan on going into the social sciences. Does this apply to everyone or just bio majors/med school?

[DarksporkLeader]

FUCK WMG

[kooziejr]

shithouse

[IvanMitosis]

rest potencial -90mV (from Guyton's physiology 11ed)

[smokey566]

its been years since A&P, is it -70mv +40mv?

[mickomoo]

-70mv, I'm currently in ap bio, that should be right...

[wafflecopter08]

k guys not all cells have the same electrophysiology. typically, the resting membrane potential is -70mv. as Na ions enter the cell it causes depolarization (rising of local potential) until the point at which the neuron fires. this point is called threshold and is typically -55mv, at which point a positive feedback cycle is created leading to rapid depolarization until its peak. cell depolarization can peak anywhere from 0mv to 50mv depending on the neuron, but is commonly accepted as +35mv

[wafflecopter08]

summary:

resting membrane potential -70mv

threshold -55 mv

peak +35mv

hope this helps :) good luck in your studies!

[vieteenboiduy]

@mickomoo haha AP biology, that was a joke. Actually, all AP classes are jokes.

[DEMM36]

no its -70mv and +35mv

[mcwcmurf]

-70mv +50mv

[CaptainJenna7]

my teacher is saying negative 70, but some say otherwise.

[xvsoothsayer]

@CaptainJenna7 It depends on the neuron. -70 is a way of simplifying it into an average number. But, the definition is -40 to -90 mV. It's just that different types of neurons with different forms of relationships need more or less to fire. 

[marc533952]

-70 and +30 : )

[xvsoothsayer]

@smokey566 Resting Membrane Potential is -40 to -90 mV. The threshold for an all or none reaction (action potential) to occur is +15-20 mV from it's original RMP. From there, the influx of sodium will peak at about +100 mV before re polarization begins.

In other words, if you start at -40 RMP in a specific neuron, Threshold for that cell would be -25 to -20 mV, and the action potential will peak at +60 mV.

[folieale]

great vid!

can anyone please tell me the name of the song? thanx!

[Jeflin1989]

its let x=x by laurie anderson

[IcyRealmster]

I wonder how much weed went into that song.

[ang2jm]

lmaoo

[fh042087]

some say the entry of neurtotransmitters differ. either chemically or electronically depending on the NT? is this true? and in addition to this, wat are the other mechanism (excluding na-k exchange) for the transfer of NT? thnx.. good video.. its just that it might be better to continue it to another neuron from the post synaptic to the presynaptic and again.. thnx...

[dustylee]

when the sodium ions and potasium ions switch possitions arent they suppose to return to normal due to active transport, or was it only intended to show the first part

[psychenova]

Yes, it's only for the first part. Certainly, they are changed back by the Na+/K+/ATPase.

[itsanthonyhere]

The restoration of the resting potential following an action potential does not use the NO/K pump, only the passive movements of ions.

[jamesdl00]

Yes, although the question didn't really ask about return to resting voltage. But it is important to realize that the number of ions that actual move across the membrane is a tiny fraction of the total difference in concentrations. It takes many action potentials in the absence of Na/K pumps to substantially degrade the ionic gradients

[egytta1]

i hate this medical stuff.but i enjoy the music.!! lol

[paulajlachner]

Okay the song totally threw me off! Nice demonstration though.

[f0xgl0ve]

Hehe, on hearing the words I immediately tried to relate it as an analogy to the K & Na exchange.. :P

[hik95]

ok, i understand the whole teaching of tht. But the music! wat on earth!?!?! wat is a hat check clerk anyway. and at an ice rink? It's soooo random.

[psychenova]

Sure, it's not related to subject at all. It just gives a nice ambient feeling.

Certainly, if you have a good song about the action potentials, I will be glad to change it :)

[smackmans]

nice, thanks

[moutaff]

cheers for that

[moutaff]

what song is this?

[psychenova]

It's the Let x=x by Laurie Anderson.