Cell membrane overview and fluid mosaic model | Cells | MCAT | Khan Academy

Learn about the major components that make up our cell membrane and the fluid mosaic model. By William Tsai. Created by William Tsai.
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Khan you rock! You have gotten me through Medical Neuro and Bio!

[@chanellovers871]

If only the teachers would explain it this way. Thanks'

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YOU MAKE EVERYTHING SO MUCH MORE EASIER OMG

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I know right!

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veryyy trueeee

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I have my first Biology test tomorrow. Hoping for the best! Thanks for the information....it's been really helpful :)

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If you do't mind me asking, how'd you do?

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@@ReasonAboveEverything no, do is correct. Otherwise he'd be saying "how'd (how did) you did?"

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Good luck

[@tigerhix]

Greatly explained, really does help. Thanks!

[@ProductofWit]

Thanks. I have a test on basic Cell Biology this August and your videos help me actually understand more of what I'm learning (basic, but more explained). I like to understand what I'm learning and not just learn by rote.

[@ayazbahaar555]

Wonderful, what a brilliant explanation.

[@jtaylor368]

Thanks, really helped me breakdown what the fluid mosaic modal is made of :)

[@rahmaniafebrianti2047]

Even i am not speaking in english, but I can easily understand, great job!! 👍👍

[@tycoon1661]

Thanks William

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My biology instructor needs to see this video. ....... how to teach biology!!. Welldone Khan.

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I love the way that you explained it. Thanks. Greeting from Venezuela.

[@nedaahmadi4679]

These videos are so far the only way that is helping me for mcat , I watch them and take notes . I was wondering if you guys offer notes for mcat ?

[@Tweetknox]

Thank you .....keep up the great work. I am thankful to have found you. I understand and can remember the fun fact about the Mosaic on the test

[@asiakakitchen4431]

Good informative Video thanks for sharing this video with us

[@Beanzybeez]

Thank you so much!!

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Is that Somalia?

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@@openworld1566 Yeah, they are exocytosis of Somalia.

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Helped alot ! "Respect"

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I understood very clearly. Thanks Sir.

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this actually helped alot omg! thank uu!!

[@jessamesa03]

Super helpful. Thank you for sharing!!

[@uwiringiyimanajacques5268]

Thanks

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This is so easy to understand. Thanks to u

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so incredibly helpful thank you

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King Khan! Thanks a lott!!!

[@rachaelgemin9465]

Amazing!

[@sadmanjahed1898]

Sir i heard that colesterol helps to bind the cell membranes as they don't get too close or far. So I'm a little confused when u mentioned that fluidity stuff.. I hope you can help me out

[@vijayasankaralingam9899]

So lipid bilayer is the one which has a quasi fluid nature and it enables lateral movement of proteins within the overall bilayer . So the cholesterol is basically bound between the polar heads of the phospholipid and thereby remains attached fixedly.

[@hristohristov5418]

Thanks buddy, helps my studies.

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Very helpful 👍👍

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Keep uploading videos on all the topics of Science. .

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I really liked this video...THUMBS UP😊

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vrey good explaining thank you !!!

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[@UNsupremeJose]

Thank you so much Khan

[@paulkta8635]

Thank you mate

[@sophienneji]

I just came across this video and I understand the cell membrane and fluid mosaic model really well. From this video, it was brought to my knowledge that CHOLESTEROL is one of the three things that make up the cell membrane but then during the course of my lectures today, I was told that it's CARBOHYDRATES and not CHOLESTEROL. I'm really confused at the moment, please help my confusion. Thanks

[@ZahraaA95]

Ya i have the same prop !

[@khalidkd8133]

cholesterol is a lipid which is a hydrophobic molecule that is why it is suspended between the hydrophobic tail, while carbohydrates are hydrophilic molecules present at the hydrophilic heads of the cell membrane.

[@sophienneji]

@@khalidkd8133 thank you😁

[@dayangdiyana2878]

thanks a lot for this video. it really helps!

[@User-084-x4x]

Thank you for explaining this so easily! :)

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your an awesome teacher

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Very well done

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Thanks!!!

[@amnaj5943]

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thanks dr :)

[@HDAFUN]

2:11 - like a buffer

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Thank

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[@caterpillar351]

if peripheral proteins can only work as receptor proteins (since they are not able to act as transport proteins.) then what about peripheral proteins that are located at cell side of membrane?

[@SharifKhan-zo3wc]

Thanks sir

[@linhnguyentung2511]

if only you can taught me in real life so my life will be much easier :(

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I wish you were my lecturer 👨‍🏫

[@ArgusAlf]

thank you :)

[@SyedAhsan94]

i am confused
you said Cholestrol acting as a buffer Decrease fluidity when temp is increased and Vice versa
however isnt it Fluidity increases with Increase in temp and low saturation of fatty acids ?

[@1walilah]

Cholesterol is most likely stable. However, the effect of temperature variation in regard to fatty acids; high temp would tempt to decrease the double bond between hydrocarbons making it more saturated; more stable less fluidity.
(vice versa).
Thus, temperature and saturation should have a direct relationship, and both indirectly related to fluidity.
( if I understood well)

[@papabearg6449]

syed ahsan the best way to thing of it is in terms of food. Oil is unhealthy, doesn't have a lot of fluidity due to the low amount of unsaturated phospholipis. Therefore when put into lower temperature it becomes congealed and not so fluid. Water on the other hand hand has i Gigi's amount of unsaturated phospholipids therefore it takes a much lower degree of temperature to make it less fluid.

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Lifesaver.

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this is poggers

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nice

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I LOVE YOU

[@abdulazizabdulrhman6918]

What is the name of the note you’re using?

[@duaaarshad7094]

I have a question. Is cholesterol polar or nonpolar? because its located between the faty acids

[@Beanzybeez]

+Duaa Arshad Chloesterol is actually amphipathic, it's partly water soluble and partly insoluble.

[@gorgeouslooks7986]

But the channel protein was like integral protein with pores that allow ions to pass through the membrane
(/\) _ CHANNEL .P
( )_INTEGRAL .P
that's wht ma G-12 ex book says ,pls tell me the difference 🙄

[@muhammadhaleemkhan2942]

👍🏻💯

[@JacindaRivera]

3:17

[@JacindaRivera]

4:30

[@ksi800]

how do the phospholipids move

[@heqly4565]

Ksi cilia

[@sebastianramirez5781]

300th like

[@muramasa7537]

It looks like mosaic floor .

[@justinsankar1164]

Hence the name

[@dead_knigh1]

50 now lol

[@ayushsaxena4880]

Not clear english

[@tantanmustdie]

Got a goosebumb at 5:41. yikes

[@izzadina5951]

Thanks