This video is a re-upped version... In the previous video I had stated that the Na+/Glucose cotransporter was an example of active transport...which it isn't...no ATP required. Sorry for any confusion caused!
@hellothere3683
9 жыл бұрын
Ahh no problem :)
@MrPollockBiology
9 жыл бұрын
cheers :)
@DNLNaNaLiZa
8 жыл бұрын
ahh, it's actually a Secondary ACTIVE transport according to Medical Physiology by Boron and Boulpaep 2nd edn, page 937 ^^,
@clasherclasher317
7 жыл бұрын
DNLNaNaLiZa It's an active transport but doesn't require ATP. Instead I believe it uses energy store in the concentration gradient to move the secondary molecule
@suhail1200
7 жыл бұрын
Glucose moves with the sodium from a low to high conc.I know it squeezes through but isn't that active transport?
@Ravioliyt
4 жыл бұрын
Awesome videos! Since the Corona virus has shut down all schools in England, as a year 12 A level student we still have to study and learn in our own. These videos are perfect for learning from because they're really clear and efficient in explaining.
@sophielaw7231
8 жыл бұрын
wow! Thank you sooo much for this video!!!!! I really didn't understand this at all before but now it makes perfect sense!!!
@MrPollockBiology
8 жыл бұрын
+Sophie Law Glad it helped!
@damanveerchahal
18 күн бұрын
Thankyou so much, I finally understand the topic for my presentation from your video.
@Firewolf_Daimyo
5 жыл бұрын
I'm glad someone taught me this because I was just given a worksheet and expected to know what to do. Life saver!
@Hugo-ym3oq
2 жыл бұрын
Thank you for explaining clearly!
@maishehab3329
7 жыл бұрын
Just discovered your channel... and I finally get this. Thank you!
@herenmarz5839
6 жыл бұрын
Great video! made this concept so much easier to understand. Greatly appreciated :)
@lcbingham1007
3 жыл бұрын
ur actually a legend this has helped me SO much
@meet6285
8 жыл бұрын
Thank you so much ^-^ ive been confused on co-transport for ages and now i finally understand it !
@jiaqili7766
7 жыл бұрын
This is so clear!!! Thank you for sharing.
@siddharthgupta9801
6 жыл бұрын
wow you just cleared all my boubts.... thank you very much
@LowCarbHealthMD
11 ай бұрын
Can you pls correct your Na-K pump segment to minimize confusion? Na gradient should be this: higher extracellularly, lower intracellularly. So that means for the Na-K ATPase, it actively transport 3 Na from inside to outside the cell, as well as 2 K from outside to inside the cell. This maintains the resting membrane potential. Thanks!
@mohammedal-shirawi8691
4 жыл бұрын
thank you for that it was helpful but the sound is so low
@adrevenue4329
3 жыл бұрын
your video was amazing thanks so much
@borthakurpa
3 жыл бұрын
Very much helpful... Thank you
@fatmaammar5635
7 жыл бұрын
Really helped, thank you!
@zhwart.hassan2199
3 жыл бұрын
Thanx very easy to understand 🤠
@nyawirawaithaka4993
5 жыл бұрын
Very well explained. Thank you!
@sobster123
8 жыл бұрын
thanks dude, really helped summarize it for todays exam>:)
@astolfo9377
7 жыл бұрын
EXAM TOMMOROWWW I LOVE YOU SO MUCH YOU ARE A GOD
@rimehsalhi8223
4 жыл бұрын
You ara a god ??? WTF the god IS one there is no other god استغفر الله
@esraa2939
8 жыл бұрын
thanks alot it's facilitated my study
@zer0days392
Жыл бұрын
It was a good one.
@alexwong922
8 жыл бұрын
Hi MR. Pollock, I am a bit confused because my lecturer told us that Na+ are pumped back out of the epithelium cell by the Na+/K+ pump. It means that Na+ are bumped back to the lumen. However, in your video, Na+ are going in the bloodstream. Could you tell me more pleases?
@LowCarbHealthMD
11 ай бұрын
Na gradient should be this: higher extracellularly, lower intracellularly. So that means for the Na-K ATPase, it actively transport 3 Na from inside to outside the cell, as well as 2 K from outside to inside the cell. This maintains the resting membrane potential.
@ham2ah
9 жыл бұрын
Hi Mr Pollock,I'm struggling with unit 2 AS Biology. Need help with understanding the cell cycle, meiosis, mitosis and genetic variation with bacteria 😊please make videos?
@MrPollockBiology
9 жыл бұрын
Hamzah413 Cell cycle, mitosis and meiosis vids all uploaded!
@satyasnigdhatripathy2018
5 жыл бұрын
Thank you very much
@user-wz8sx6pj3i
3 жыл бұрын
OMG YOU are amazing thank you!!
@assemubigaliyeva5872
5 жыл бұрын
Thanks bro, I get it now. So well explained
@TheWarriorLP16
7 жыл бұрын
Thank you very much! You saved my day
@alesandrom5636
4 жыл бұрын
Awesome 👏 😎
@thilinaalagiyawanna3680
4 жыл бұрын
Thank you very much. I think Sound level is very low. Anyway thank you.
@TheOlgaStudio
5 жыл бұрын
You say that Co transport is an example of passive transport, but isn’t it in fact secondary active transport? Sodium ions are translocated using ATP, and by co transport the glucose can be absorbed.
@AG-ql1sy
6 жыл бұрын
hi sir, surely the active transport occurs before the cotransport? because wont the removal of sodium ions set up the concentration gradient, thus the sodium in the lumen will diffuse with the glucose molecule
@Hameed410
8 жыл бұрын
Thank you .... Very well explained
@MrPollockBiology
8 жыл бұрын
+Mohammed Hameed shareef Cheers!
@Goodfellas981
5 жыл бұрын
Where does potassium go after?
@anxhelo8649
3 жыл бұрын
thank you so much!
@katied4286
5 жыл бұрын
I completely understand now!!
@virtutepuella7766
5 жыл бұрын
very helpful. a bsc nursing student🤗
@mardenidres
3 жыл бұрын
Thankyou very useful
@DrAgam.
7 жыл бұрын
very good explaination
@jakesatov7454
4 жыл бұрын
Hey, thanks for posting.. I'm not far enough along in my nutritionist certification to understand cotransports and the like, but I am working on trying to understand the roles of enterocytes and villi/micro-villi. Unfortunately the text I was given doesn't give me much in terms of visual aid to understand what it looks like and how it lines the small intestine and therefore how to understand it's function. The start of your video with the bisection of the intestine was so helpful. If you have a video that just discusses enterocytes and villi, would you be so kind as to post a link? Thanks again!
@jakesatov7454
4 жыл бұрын
Interestingly in trying to find more info, it looks a lot like nobody else has shared such a simple and helpful view of the intestinal brush border. Though I finally figured out what I need to. The enterocytes are the whole cells and the villi are the finger like parts of that cell. My mind almost exploded
@hellothere3683
9 жыл бұрын
Is there a difference between this video and the one with the same title that was deleted? Thank you!
@Fran-xf6yf
8 жыл бұрын
Thanks for this video it has really helped. I was just wondering why is there a higher concentration of glucose in the outside of the lumen compared to inside the lumen? why is there a low --> high concentration gradient with glucose becasue surely there would be a lot of glucose in the inside of the lumen of the small intestine (due to the breakdown of foods) compared to the outside of the lumen?
@user-bb2mf4vd2o
7 жыл бұрын
Thank you , very helpful!
@mohammedsadekon
8 жыл бұрын
where do the potassium ions go after the process ? do they accumulate in the epithelial cells of the small intestines ?
@MafiaDiesel
8 жыл бұрын
K+ inside the cells passively diffuse to the blood stream again because there is a low concentration of K+ in the blood compared to the cells. that's why the Na+/K+ pump maintain that unbalance by getting K+ inside the cell and Na+ out.
@jacktully5651
5 жыл бұрын
great vid buddy
@i_am_gods_child
3 жыл бұрын
this was sooo helpful thankyou!! I have a test on unit one tomorrow and it feels really good to finally understand this 😁
@nazanin.zkeshvari1316
4 жыл бұрын
thanksss so useful for me
@FatimahA
7 жыл бұрын
Thanks!
@molad7669
6 жыл бұрын
You said sodium moves actively in sodium potassium pump but you showed that sodium is moving into the blood stream from high concentration gradient to low concentration gradient which is basically facilitated diffusion, could please Make me less confused
@nyawirawaithaka4993
5 жыл бұрын
Thank you!
@mashaelm6302
4 жыл бұрын
Thank you so much
@antoninomineo8644
7 жыл бұрын
Isn't SYMPORTER a secondary transport, so an active transport.?
@d3proX12
3 жыл бұрын
You are a god
@naqibshami2696
5 жыл бұрын
Thanks
@BlueSky-lc4gx
3 жыл бұрын
What about water transport from lumen into blood?
@beckwilde
7 жыл бұрын
THANK YOU!!
@moshyalemam3954
Жыл бұрын
The voice is not clear but great contant
@agnibonendasari3814
6 жыл бұрын
thanx
@azitakolahi2122
5 жыл бұрын
Thanks bro
@mohammadayoub3711
7 жыл бұрын
After digestion, during absorption isn't there more glucose in the lumen of intestin?
@Anonymous-fj2uo
7 жыл бұрын
That's what I was wondering! By I'm guessing there is more glucose in the lumen at the start but after normal diffusion the concentrations in the lumen and in the cell levels out. That's where co transport comes in to push the remaining glucose out of the lumen. I hope that makes sense
@Anonymous-fj2uo
7 жыл бұрын
*But
@Nah-id-win610
4 жыл бұрын
God bless you. Ty so much. XD
@shabnumrashid5240
8 жыл бұрын
can u please make video on unit 5 essay questions
@shabnumrashid5240
8 жыл бұрын
2016 spec unit 5
@PankajYadav-li5nr
4 жыл бұрын
Sir volume is low😟
@oneummah7120
4 жыл бұрын
😍
@lewiswhitehouse853
3 жыл бұрын
Yo lydia
@abdullahafzal5264
5 жыл бұрын
You're a don
@jatherinak7330
5 жыл бұрын
you are damn soft. i could barely hear anything??!
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