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

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Created by Raja Narayan.
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Опубликовано:

30 авг 2014

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Комментарии : 76

@DeathDoily 9 лет назад

my god, your writing is gorgeous

@ThelxoxlGirls 5 лет назад

That was the first thing I noticed, lol

@wenxiama6747 3 года назад

Beautiful hand writing!

@goodgrief1029 7 лет назад

Seriously, thank goodness for Khan Academy

@winterviews 9 лет назад

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 4 года назад

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

@arthurooms3967 3 года назад

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 2 года назад

Finally found my soulmate.

@TrinhNguyen-sn7ks 3 года назад

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

@haddadmj96 8 лет назад

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

@mihirmakwana9012 4 года назад

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👏

@hawraalabbad2562 6 лет назад

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

@parulaggarwal9405 8 лет назад

Better than my Biology teacher

@sariputriyanti1494 8 лет назад

Hahaha

@Noor-mu1bl 4 года назад

Thank you very much!! شكرًا جزيلًا.

@ishaislam7998 3 года назад

Who is watching this in 2020?

@Friendlytails1 7 месяцев назад

Dec,2023 bro

@jamiejones18 8 лет назад

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 6 лет назад

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

@LightningBoyNation 7 лет назад

thanks, I needed this for my english class :D

@christinaeggleston9426 9 лет назад

Well put together and easy to understand!!!

@LaBam85 7 лет назад

fantastic thanks for using examples in the body

@KyleStLouis-wl9vn 6 лет назад

awesome dude! excellent visuals! very informative!

@zainabalbakaa4429 8 лет назад

u r a life savior.... thaaaaanks

@albertom6239 7 лет назад

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

@thedisintegrador 7 лет назад

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??

@inlhathoda2172 7 лет назад

drawing and notes are nice for revision

@DenaturedProtein 4 года назад

Thank you, Sire

@eliseujuniormoreira335 8 лет назад

Perfect!

@GREGCHEN0421 10 лет назад

Love it. Thanks.

@awwbonsuafia8174 5 лет назад

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

@alibarrera 7 лет назад

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

@chrisvilavelha 4 месяца назад

Fabulous video, best explanation ever !

@danielknorr8624 3 года назад

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

@krystalgathers8984 9 лет назад

Awesome!!

@princesszinka 4 года назад

Super! Thank you very much!

@mernaali6487 2 года назад

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

@lolabroccoli9936 6 лет назад

Thank you😍

@parulaggarwal9405 8 лет назад

Keep uploading 👏👍

@alimoballegh82 11 месяцев назад

Thank you!

@akshitarawat1970 8 лет назад

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

@Gabriela-fc8hm 4 месяца назад

Me enamoré de su voz

@FatimahA 7 лет назад

OMG! That's perfect!! Thank you! 👌💙

@gregbalteff1529 10 лет назад

nice job

@backstreetfan2887 3 года назад

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.

@metaverse. 3 года назад

Damn man thanks

@khushbooparshurampuria4341 2 года назад

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

@vaishnavigokhale7698 6 лет назад

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

@Outside248 2 года назад

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

@akshitarawat1970 8 лет назад

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 2 года назад

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

@carolinaamador179 5 лет назад

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

@aarahahamed5039 8 лет назад

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

@dorkle9085 2 года назад

I think it's Photoshop.

@cindy_le1106 Год назад

his handwriting is pretty :o

@Dr.AboliGaikwad 8 лет назад

what is transcytosis

@yasar6701 5 лет назад

Thanks a bunch

@Priest-cz1mr 10 месяцев назад

❤❤❤

@stkparsa 6 лет назад

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

@myn1105 9 лет назад

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 9 лет назад

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

@angeloquimoyog6448 7 лет назад

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.

@jurgenziesmann5212 3 года назад

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?

@inlhathoda2172 7 лет назад

whats gradient

@danielklinsmann8546 2 месяца назад

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

@mamamoo5440 8 месяцев назад

BETTER THAN MY TEACHER HUHU

@peacepeace8164 6 лет назад

Your writing 😍

@0674audrey 4 года назад

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!

@pest2920 6 лет назад

@sarahlopez3901 5 лет назад

passing my bio exam because of this vid bless up

@renuverma6995 6 лет назад

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.