POTASSIUM. POTASSIUM. POTASSIUM 9:02 9:41 9:43 10:08 10:18 10:23 not sodium

@msokiedokie123

10 жыл бұрын

Good looking out

@weebleapplesmooooo

10 жыл бұрын

I am a hardworking man 8-)

@zaimahbegum-diamond1660

7 жыл бұрын

Sean Ngui thank you..I picked that up, which means something is making sense. please do a new one Mr Khan.

@AA-ge6vo

6 жыл бұрын

Thank god i am not the only one; I was losing my mind!!!!

@MyAdventuresInc

5 жыл бұрын

ikr

Despite getting a little confused with the mix up with potassium-sodium, and sodium-phosphate... I found this video so HELPFUL! It was quite simplified and easy to follow. Thank you for your help.

You mix up your solutes many times. First you say that you pump out 3 phosphorus when you meant sodium and then you say you pump in sodium when you meant potassium. Otherwise, really appreciate the video.

I'm learning more on KZread than in school for 2 reasons: 1) Visualization of information in an entertaining manner; and 2) Predisposition to learn (I choose what I'm interested in learning). This is the future of education.

07:25 Instead of "phosphate groups" it should actually be Na+ that gets pumped to the outside.

You are the best! Finally someone who can make sense of physiology and make it understandable. If professors cared enough to teach like you do there wouldn't be a pass or fail. It would be a passed the class only scenario. Thank you. I will be following all of your videos and telling all of my friends and family where they can go for clarity. Thank you. 1,000 times thank you.

you said sodium ions in step 5 when it was supposed to be potassium

@llee9ful

3 жыл бұрын

Yes I saw that! i'm not going mad :D

Cheers mate, i'm a year 12 human bio student from Australia, about to do a test on this tomorrow and was so confused up until now. Your fantastic at explaining and i'm going to forward this video on to all my friends as we are all so confused. Thanks man! i really appreciate it :)

These videos are all truly great, but this is the second one in which you have said "sodium" when you actually meant "potassium." Please be more careful!

@felicegranados7897

10 жыл бұрын

thats why he made a correction video on it :)

He made a few mistakes with naming Na K and K Na. He also called the Na in the second pump he drew to the left Phosphate,but he explained it very well.

I agree, but for specific reasons. Although a good teacher will explain this equally well, KZread has these benefits: 1) you follow the explanation at a time of your own choosing, 2) there's less to no interference by classmates, 3) you can pause, repeat at will.

what does he use to make these videos? It looks really fun!!

Why would i read my biology notes when i can just watch this :D Thanks for making my life easier in biology!

i cant believe how much sense this makes ! your are the best

@127miles - Yes, there is: Neurosciences. You can graduate in Medicine and then specialize in Neurosciences (like António Damásio did) or you can graduate in Biochemistry and then graduate in Psychology and then you'll be able to study Neurosciences. Actually if you take that second option, you'll understand more of the way the brain works molecularly (bcuz of Biochem) and you'll also understand better the human mind (bcuz of Psychology). My advice is: second option ;)

This guy explains things better in 14 minutes than my lecturer does in two hours

There are so many mistakes said in this video. You should redo it.

my god frank zappa is alive and teaches about neurons!!

He said sodium instead of potassium and since i hardly understand this i was going to lose my mind until i read the comments

Nice Video How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane That You Share , So Very Nice Thanks You

yes, he said anywhere along the neuron that isnt mylinated. So yes you would find it on axon (nodes)

How many other people gringe when this guy says Sodium as he writes K and Potassium as he writes Na!!

@QuangLi

6 жыл бұрын

Michelle Anderson "gringe"?

To those of you about to fail your tests, I salute you.

I actually learned two things. The sodium/potassium pump and how a volt meter works :P Really effective vids man. :)

yup, its sodium ions that are released outside the cell, and the phosphate is released inside the cell simultaneously =P

Look up Synapses, I think that should give you the general idea. Basically the action potential opens Calcium channels and this leads to Neurotransmitter (or even Hormones maybe?) being released outside the Neurone, converting the Electrical Signal into a Chemical Signal.

actually in its resting state the potential difference is -100mV (resting membrane potential) this is Veq, or equilibrium voltage, it goes to -70mV when the AP passes this is its driving force (therefore 30mV is the driving force of the AP)

My tutor yayy! Thanks Khanacademy

yeah obviously its a fantastic video and me aswell appreciate this man...i was also confused but now its fine......

Crystal clear (except minor errors) - thanks. KZread is 'king marvellous for study!

I LOVE the way you explain this......thank you so much! I would LOVE to take your class.....do you teach in Chicago? LOL have a great day!

The Na would be constantly moving around (kinetics) so at some point the Na will combine with the receptor sites. Also the inside of the cell is also positive so the Na ions would still repel even if the inside of the cell is less positive. At least that is my thought/explanation

Your videos are fantastic, a great tool for gaining in general biology knowledge

Thank you BigEdJon, that makes a bit more sense to me now.

Okay. That makes more sense

AWESOME VIDEO....helped a lot fr my xams!!!

You made some errors...step 4 is Potassium, not sodium (as you said) and I think you made another error earlier in the video. Can you fix these so your video will make more sense?

Thanks! the videos I was watching showed repolarization as only K flowing outside the membrane, bud didn't explain how the k returned inside to polarize the cell again. It's the Na/K pump!

This is explanation of Re-polarization to resting potential

Wow this is really great Thanks for the info I understand it now

@nafizkarim he should really check back to this vid and annotate the mistakes. if it wasnt for u i wudve got mixed up, thx for the corrections :)

You mixed up your sodiums, and potassiums a little bit but great video, very helpful!

too many mix ups.

Previous Video on this series: Anatomy of a Neuron Next Video on this series: Electrotonic and Action Potentials

Thanks.. Its a great help. God bless u!

thanku veryy much sir.. God Bless you

if you say that the main reason of negative resting potential is the high resting permeability of K+, what happens when K+ in the blood goes high? As I know, the K+ might even enter the cell but it (the cell) becomes less positive, but still remains negative, for example at - 60 or - 55 mV. how to explain this negativity in this case?

You're a genius.

Khan academy is awesome 👍

these videos are great! thanks for the lesson i feel like i understand more now!

This video was super helpful, thank you!

that awkward moment when you realize that You Tube is more useful than school...

i love all the pretty colors

sir,the video is very useful in understanding about the sodium potassium pump.But there is 1 mistake in recording,when you explain about two potassium ion by mistake you say that these are sodium ions,overall the video was good.

Khan Academy has only been up since 2006, and it already has 3518 videos on KZread, that's almost 1.5 videos a DAY. How does one man learn this much!

I really appreciate uploading this video! It is really helpful for my biology test!! Really, thank you soooooo much!

u said the phosphates are pumped outside it's the sodium

saal keeeeeep it up.. ur a gr8 teacher

Brilliant...Thanks!

@nafizkarim poor guy he kinda just got a bit unattentive for a sec you guys , he was making it on purpose to see if you were paying attention,LOL, the videos are AWESOMEEE :D i love the one of the krebs cycle.

thanks alot Sir ! God bless u

thanks for the video

I love your videos but could you please make an video about biological membranes relating carrier proteins, channel proteins, diffusion etc. thank you !

Please be careful and attentive. Don't teach the wrong things to people.

Thanks a lot!!!! You're awesome!!!!!!

Hi! Can you describe a simple experiment, explaining the contribution of the pump to the membrane potential?

i have one question, along the path of the neuron, how/where is electrical signal related to chemical signal ?

Step 4: He states that we have 2 Na+ ions bonding, but he writes down 2 K+ bonding...

So the signal is received at the dendrite right? Does this electrical potential gradient exist from the tip of the dendrites, through the soma (cell membrane), down the axon and to the axon terminals? I thought that the gradient only existed on the axon and the signal traveled down the axon when the signal gets to the axon hillock. Maybe I am missing something...can someone help?

Awesome job explaining

i think there is also another error at the beginning, Dentrites is not a sender is a reciever !!

I LOVE this man!

you told that there are 2 potassium ions passed into the neuron so does the no. of potassium ions inside the cell remain less throughout our life? please answer my doubt

what does it mean to have a negative voltage?

thank you

do you have anything else on active transport????

Why would the Sodium ions want to bind to the receptor site of the (orange) protein in first place if the inside is less positive? Positive-Positive are not attracted to each other. Someone please answer that. Thank you very much.

What happens to a cell if Thallium (TI) binds on it instead of potassium? (It's known that TI got a higher affinity to the cell than K+) The cell gets bigger and bigger but I don't know why...captain!

Everytime he says "cell", I hear it as "Sal".

Great Job! Love your vidoes!

still a little confuse. what occurs during the resting state ( such as specific ions inside and outside the neuron) i know that part, but what is the voltage inside the neuron during the resting state?

But, doesnt a neuron actually hold data other than the superposition of the stimulation waves? how is that data such as a memory of how to carryout an action stored and stimukated when in need of carrying out the action?

@sabrinsawaid8335

6 жыл бұрын

Fissle Wine sorry im late. but the reason why a neruon does not carry memory or any genetic material is because it does not synthesis tRNA so it can not go through the DNA replication process.

What are the things that affect the na/k pump activity?.. Today my exam😓

First of, thank you for all the awesome videos! I had a question though, it resting potential -70mv or is it 90mv, or is it between the two?

Thabk you so much omg

Would this be classified as resting potential?

Sad but so true!

So ATP is not required to change the protein back to its original shape?

AWESOME video!!

yeah the sodium and potassium are backwards at times

@ 9:04 we have 2 POTASSIUM not sodium ions bond to the "pump"

That's what I was thinking.

yes

When does ADP dissociate from the pump?

YOU KEEP MIXING UP K AND NA!!! hopefully most of us caught it beforhand!

what program do you use to draw all that, it's such an interesting program.

i love you mr khan

Help!!!!!! Does the Na+\K+ pump works during the action potential or only at rest?

Lol he kept calling the potassium ions sodium

Good vid