Cell membrane fluidity | Cells | MCAT | Khan Academy

Learn how the phospholipids in the cell membrane maintain membrane fluidity. By William Tsai. Created by William Tsai.
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[@christinalee55]

Yay! I finally understand how cholesterol affects fluidity! Thank you!

[@rupinspunjab5855]

Bcjvh

[@jolopineda5046]

@@rupinspunjab5855 0

[@alexd15680]

You forgot to mention that fluidity of the membrane depends on the cis and trans of unsaturated fatty acid tail. If you have a trans unsaturated fatty acid tail, fluidity decreases because the space between phospholipids are tightly packed. On the other hand, if you have cis unsaturated fatty acid tail, the fluidity increases because the phospholipids are less packed.

[@v-tube6069]

yeah.. i was waiting for this concept throughout d video. thanks.

[@Sam-kk5gn]

Exactly What I was thinking dude

[@crisnice1]

i should pay my propins to you, not my teacher who always tells me "go search"

[@tushinkapereira3397]

watching this in 2021, no one could have explained it better! thank you so much :)

[@shinjikagawa4358]

Explained superbly... Awesome sir

[@Isabella-d3r5h]

Merciii❤

[@DigitalOutlawed]

THANKS SO MUCHH

[@MajidAli-lm2ys]

This help him to understand! Thank you

[@swatibisht45]

Thank you so much
It would be really helpful 🙏

[@zacharylayman8941]

Really helpful video

[@kimhernandez7739]

Thank you!

[@v-tube6069]

That was very helpful. Thank u

[@gohogswps9732]

excellent explaination. thanks.

[@claudiavazquez9640]

thank you!! super helpful

[@tooffaa3902]

It's wonderful

[@269Tanya]

thanks!

[@sophiaa7698]

thank youuu! :) that was really helpful

[@karass5616]

thank you very much!that was really helpful😊 actually i was wondering how can membrane proteins affect its fluidity? i really hope you answer me you have a great way to explain 😊thank you

[@ashoksainoji2614]

iss 09

[@ex8280]

I'm watching this trying to figure out how spike protein get out of the cells. Can anyone lead me the way?

[@ammararif376]

What happens if cholesterols are much higher than you need ?

[@lolk6524]

Does chain length have an effect on the fluidity of the cell membrane?

[@animeguysaremylife]

Studying this in my Intro to Cell Bio class and the answer is yes--longer chains actually decrease fluidity because there are more interactions between the tails (I think of it as longer tails having more opportunities to be "tangled" and not as mobile!)

[@noemibernal332]

THANKKK YOUUU !!!!

[@basslineur3965]

He sounds so sympathetic to the phospholipids 🤣

[@ianstdizier4325]

The only reason I'm passing college...

[@farjanamd281]

Pls make more videos like these for Alevel biology...it’s very helpful... thank u

[@eugeo0718]

what is the purpose of the fluidity??

[@perantau1285]

i love you !! thank you, i have a test this evening :)

[@jeannie4507]

thank you so much for this. i'm learning about cholesterol and research is what I resort to during this time. thank you!

[@sanelemaseko759]

Thank u so much. This was informative...

[@simransimran1323]

so then what is the main function of cholesterol molecules in the plasma membrane would it be that it helps maintain fluidity

[@vaibhavpandey1831]

Cholesterol has one more function. It enhances the permeability barrier properties of the lipid bilayer.

[@shrikesavadithya6683]

I couldn't find a paper verifying the research. For example cholesterol uses in the wiki page has a citation need. So can you direct me to a paper that has proven it ?

[@easy-peasy9906]

Cholestrol help keep phospholipids apart as well as together...i can't really get it

[@anber4129]

Wow that was so helpful.

[@1967davidfitness]

So a diet rich in saturated fats is a poor one, better still consume more unsaturated fats, oh those clever keto zealots, I pity their ignorance and arrogance.

[@Qwerty_789]

saturated fatty acids are non essential fats fora reason, they serve no purpose in the body.

[@kmcveigh100]

Well it depends on where the saturated fatty acids end up. If they primarily get metabolized through beta oxidation >> Krebs cycle, then they won’t end up in phospholipids. This idea is just energy balancing and is probably too simplistic. I will continue researching these topics

[@1967davidfitness]

@@kmcveigh100 The cell membrane prefers polyunsaturated fats, a cell membrane is affected by saturated fat, so it's best to reduce saturated fat in the diet.

[@ferihanhussein]

Thanks

[@Joeythegoats]

Why i wasn't taught this in high school??

[@tanyahorynova425]

can you explain the differences between unsaturated FA in affecting the fluidity? I learned that the DHA has the most positive effect on the fluidity whereas the bonds between omega-6's are much tighter. But I would like to understand it better. Why?

[@faryalhuma9522]

Like plant cell membrane shows more fluidity than animal's cell membrane at same condition ????

[@bolin110]

Hi, could you tell me what software or tablet you used for writing/drawing during your lecture? Thanks.

[@ramiyanoor8376]

The fluidity of Cell members depends on:-
1.lipids
2. Proteins
3. Glycoproteins

[@omarhd2294]

thaaaaaaaaaaaaaaaaaaaaaaaank sooooooooooooo much

[@cynthiaoliver4469]

Is cell membrane fluidity the same as cell membrane dynamics?! Gosh am sooo confused 😥

[@muskangarana8074]

Thankyou so much for this explanation.

[@safwansuhaib2930]

Thank You Very Much Sir I Learnt a Lot From This ..

[@unknowntobeknown7281]

That was really helpful man but I wonder why cell membrane acts as a fluid ?

[@kathya1956]

But if we look at human body, temperature should be pretty constant.

[@siyasawan9426]

this really helped me understand this concept

[@محمدأنور-ه4ب]

you do great work for facilitate the Science

[@mr.sharma125]

THANK YOU!!!! YOU SAVED MY MARK

[@zeinabfarhat1920]

ABSOLUTE LEGEND !!!

[@anythingsahaj7467]

thanks man !

[@wawi8588]

Thank you so much

[@sojoudnasser001]

Thank you ❤

[@duckersj5623]

You the best

[@mohammadal-bitar6536]

thanks 😊😊

[@neelamsharma5920]

Please give me
relationship between fluidity and viscosity