Neuron resting potential description | Nervous system physiology | NCLEX-RN | Khan Academy

Created by Matthew Barry Jensen.
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[@sadeed2]

OMG
FINALLY someone I understood this concept after 14 years of study in the field of biology.
Everyone would get to the resting membrane potential and not explain how the membrane potential got to be negative within to start all the diffusion in the first place (like the origin of chicken and egg). The OA produced by a fetal or new neuron starts the whole charge difference. THANK you!

[@grac68g]

yes! I found this to be the exact part where my understanding got muddy

[@Fortynienq12]

Just one word:-phenomenal

[@brontegarside5003]

Thank you! I was having so much difficulty with this concept and my lectures were no help at all! This made neuron resting potential so simple to understand!

[@raphro3845]

One of the best Khan Academy videos not done by Sal that I've seen so far. Very nice Job! Looking forward to watching the rest of the playlist. Thank you!

[@pallavee31]

Thank you! Very well explained.

[@wendyheng6467]

I thought the resting potential is around -70mV...

[@LandonPate]

That's what my Brain & Behavior book says as well, but, as a general rule, the resting potential will be anywhere from -40mV to -80mV.

[@grac68g]

We use -60mV to -70mV in my neuroscience class but ive seen -80mV in khan academy vids before

[@wendyheng6467]

Thanks for all the replies everyone!

[@oluwanifemikolawole3557]

@@wendyheng6467 lol not 3 years after!!

[@JamesMuliawan]

@@oluwanifemikolawole3557 i thought -60mV is the threshold

[@SiriusFuenmayor]

I have seen two explanations of how the neuron mantains a higher concentration of potasium ions intracellulary, one is that the negative electric field inside the cell pulls the positive potasium ions inside, preventing them from escape, the other explanation is that sodium-potasium ion pumps keep getting potasium ions in. Which explanation is actually correct?

[@deiborutrerumut8627]

Discuss the electrical charge of resting neuron answer

[@hippopotamus_nr2587]

quick question (i"m a rooky at this, so don't try too hard to explain in a comment if it's not possible)
why don't the positive charged ions one 1 side of the membrane bind with the negative ones on the same side, and become neutral?

[@rinaf51]

thank you for this playlist

[@lucianoval903]

Very good

[@charleshall9629]

What if ba2+ is on the outside of the membrane. Stealing electrons from the ca2+ ion? What would the action potential of ca2+ be then?

[@nickmahy4125]

The extracellular K ions are attracted to the inside of the cell but why doesn't the layer of +charge on the outside of the membrane repel them? Same for Na.

[@subtilreaction]

Nick Mahy I believe that is where the Na+/K+ pump comes into play. You have to go across the electric gradient to achieve this, hence the use of ATP as energy. Correct me if I am wrong here.

[@zeyabdi5943]

I don't get this ....why isn't he talking about sodium potassium pumps and potassium ion channel ?

[@georgyorgy2]

That's how ions are transferred causing changes in potentials

[@muxaffarally9042]

Monster neuron

[@spitama1234]

Tnxx

[@prabhanshukatiyar4635]

hey sal explained something else in sodium potassium pump!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@painstakingmedic.4073]

I don't get why electrical force is behaving so random

[@cutieepie757]

sorry but the voice of the person is soo annoying it gives me anxiety lol

[@naginaafridi2730]

cutiee pie hahaha same here

[@undercoverngel]

I like his voice. stop being a complainer.

[@uberalles2465]

@@undercoverngel I agree. We should all appreciate that Bill Gates has made this free for us.

[@kayceelondon]

omg right 0:29 just annoyed me lmao