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

Created by Raja Narayan.

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[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!

[goodgrief]

Seriously, thank goodness for Khan Academy

[TrinhNguyen-snks]

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

[mihirmakwana]

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👏

[haddadmj]

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

[hawraalabbad]

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

[jamiejones]

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).

[albertom]

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

[chrisvilavelha]

Fabulous video, best explanation ever !

[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??

[christinaeggleston]

Well put together and easy to understand!!!

[LightningBoyNation]

thanks, I needed this for my english class :D

[khushbooparshurampuria]

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

[KyleStLouis-wlvn]

awesome dude! excellent visuals! very informative!

[danielknorr]

"bad things can happen" oo ominous

All that aside great video, very helpful

[inlhathoda]

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.

[awwbonsuafia]

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

[LaBam]

fantastic thanks for using examples in the body

[backstreetfan]

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.