How do things move across a cell membrane? | Cells | MCAT | Khan Academy

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[@TrinhNguyen-sn7ks]

This is soooo helpful! Makes it easier to understand the info in the textbook while you study.

[@goodgrief1029]

Seriously, thank goodness for Khan Academy

[@winterviews]

I sometimes laugh when I'm learning a new concept and it fits into my existing knowledge. I don't know why but it's this weird laughter I experience when I'm having such a profound learning experience. I get like one or two a year, and definitely got one watching this video. Thankyou!

[@alokneet]

Marcel Wintervoss you are destined to be a sci fy. Super villain 🦹‍♀️ 😂

[@arthurooms3967]

No joke I just got the exact same and after the video i checked the comments and this was the first one lol. I think it’s more that he explains a whole concept in 12 minutes better than my teacher in 4 weeks

[@michaelkhuvung981]

Finally found my soulmate.

[@DeathDoily]

my god, your writing is gorgeous

[@ThelxoxlGirls]

That was the first thing I noticed, lol

[@wenxiama6747]

Beautiful hand writing!

[@Noor-mu1bl]

Thank you very much!! شكرًا جزيلًا.

[@parulaggarwal9405]

Better than my Biology teacher

[@sariputriyanti1494]

Hahaha

[@jamiejones18]

There is also 2 other active forms of transportation linked with exocytosis and endocytosis called: Pinocytosis (Transport of liquids in or out of a cell [Think PINO-cytosis (PINOt grigeo as in the wine!)] and phagocytosis (Transport if solids in or out of a cell).

[@renuverma6995]

Jamie Jones there's one more called Autophagy. When mitochondria is engulfed in the lysosome, a little similar to phagocytosis.

[@chrisvilavelha]

Fabulous video, best explanation ever !

[@albertom6239]

what software/hardware did you use to take these notes? they are amazing, I just discovered that reading colours over black is great.

[@hawraalabbad2562]

Thank you for these lessons , you saved my life ! Seriously 😭🙏

[@mihirmakwana9012]

Whoever is teaching in the video he is just excellent. Respect for you sir thank you so much ❤ the way he is explaining every single details👏

[@haddadmj96]

Gunna watch the whole transport across a cell membrane playlist, thank you so much!! Danke! :)

[@LightningBoyNation]

thanks, I needed this for my english class :D

[@thedisintegrador]

Just a quick question - how does the molecule of glucose (or whatever else) "attaches" to the ions? Maybe some negative charges on those sugars or something??

[@alimoballegh82]

Thank you!

[@christinaeggleston9426]

Well put together and easy to understand!!!

[@zainabalbakaa4429]

u r a life savior.... thaaaaanks

[@DenaturedProtein]

Thank you, Sire

[@Gabriela-fc8hm]

Me enamoré de su voz

[@ishaislam7998]

Who is watching this in 2020?

[@Friendlytails1]

Dec,2023 bro

[@backstreetfan2887]

CLARIFICATION: For the endocytosis part, the substance is not in a vesicle beforehand. The vesicle forms when the cell membrane invaginates (it folds inward). However for the exocytosis the substance is indeed in a vesicle to begin with and it fuses.

[@danielknorr8624]

"bad things can happen" oo ominous All that aside great video, very helpful

[@princesszinka]

Super! Thank you very much!

[@mernaali6487]

I can’t say anything but the perfect explanation ever🤝🤍✨

[@awwbonsuafia8174]

you are very good...made it so easy and simple for understanding....thanks

[@KyleStLouis-wl9vn]

awesome dude! excellent visuals! very informative!

[@LaBam85]

fantastic thanks for using examples in the body

[@FatimahA]

OMG! That's perfect!! Thank you! 👌💙

[@inlhathoda2172]

drawing and notes are nice for revision

[@alibarrera]

For the sodium-potassium pump, you had the ATP on the outside of the cell... that reaction occurs on the inside of the cell.

[@cindy_le116]

his handwriting is pretty :o

[@khushbooparshurampuria4341]

loved it...just a query....antiport means one downhill and another uphill so if that's true than in na+ glucose antiport, na+ is downhill we all know that, but is glucose downhill or uphill? because you said that glucose is high in intracellular space so in that accordance glucose is also downhill, so both downhill doesn't make sense to active transportation?....please anyone address my query

[@aarahahamed5039]

what software does he use for these kinds of presentations? :D :)

[@dorkle9085]

I think it's Photoshop.

[@vaishnavigokhale7698]

Very nice video. All the vital cell movements explained with so easy to remember examples .

[@carolinaamador179]

AMAZING!! SOOOOO helpful and clear and wonderful!! THANK YOU SOOOOO MUCH!!!

[@metaverse.]

Damn man thanks

[@Outside248]

How can a symport be called an active transport while sodium is flowing from outside to inside i mean from high to low conc so its passive ! But cause of that glucose molecule we called it active ?? Thanks for your effort

[@GREGCHEN0421]

Love it. Thanks.

[@krystalgathers8984]

Awesome!!

[@gregbalteff1529]

nice job

[@eliseujuniormoreira335]

Perfect!

[@lolabroccoli9936]

Thank you😍

[@Dantheman12999]

Wating biochemistry KA topics on 1.5x speed 11 days before my second MCAT. Anyone else here studying??

[@akshitarawat1970]

in this video in case of symport ,y u called it secondary active transport when as when sodium ion goed into a cell thts a passive transport not active,right ????

[@Outside248]

That question is the same as mine wish he answers !!

[@yasar6701]

Thanks a bunch

[@parulaggarwal9405]

Keep uploading 👏👍

[@jurgenziesmann5212]

You state several times that ions want to flow somewhere. How is that possible? How do they make up their mind what they want? How do they gain and store the knowledge necessary to make decisions? Do ions have a brain?

[@mamamoo5440]

BETTER THAN MY TEACHER HUHU

[@myn1105]

wonderful video. There is only one thing i didn't understand is the secondary active transport ! The part i didn't understand is the way the energy was set up by the gradient ?

[@hustlehardstudyharder8197]

Moon Light It was set up by the primary active transport i.e. the sodium/potassium pump.

[@angeloquimoyog6448]

I think in secondary active transport uses ions by pumping out ions out of the cell, which causes molecules or ions to be transported across the membrane due to difference in the electrical gradient inside and outside of cell.

[@akshitarawat1970]

when in the case of ka its passive thn y in the case of na it active....plz explain//??

[@stkparsa]

You sure glucose entering into blood stream is not a uniport? aka passive

[@renuverma6995]

Na K ATPase pump maintaince the electrochemical gradient of Na low inside the epithelial cell by pumping sodium outta of epithelial cell through basolateral membrane and into the blood. If not then sodium gradient won't be maintained between gut lumen and epithelial cell. GLUT2 present on the basolateral membrane of epithelial cells allows facilitated diffusion of glucose down the concentration gradient into the blood. In the blood glucose goes inside the RBC through GLUT1 by facilitated diffusion. Therefore, from apical to inside of epithelial cell it's symport and from basolateral to blood it's uniport.

[@peacepeace8164]

Your writing 😍

[@0674audrey]

endocytosis is not well explained! Since the membrane proteins ( EGFR) can be endocytoased when it is not in a membrane vesicles before it is internalised!

[@Dr.AboliGaikwad]

what is transcytosis

[@sarahlopez3901]

passing my bio exam because of this vid bless up

[@deleted3142]

They actually literally walk along microtubules (forgive my spelling) in the cytoskeleton KZbin has a cool video that shows it!

[@PepsiT98]

Is another word for symport cotransport? Or are they different?

[@syedalinaqizaidi1107]

symport is a part of cotransporter

[@inlhathoda2172]

whats gradient

[@pest2920]

Qs

[@jacobvandijk6525]

@ 4:32 ONCE AGAIN, ATP isn't an energy!!!!!!!!!!!!!!!!!!!!!!!!!!! So poor.