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!
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
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?
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
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.
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.
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?
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
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
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.
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?
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.
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!
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!
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
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!
Ahh no problem :)
cheers :)
ahh, it's actually a Secondary ACTIVE transport according to Medical Physiology by Boron and Boulpaep 2nd edn, page 937 ^^,
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
Glucose moves with the sodium from a low to high conc.I know it squeezes through but isn't that active transport?
ur actually a legend this has helped me SO much
Thank you for explaining clearly!
Thank you so much ^-^ ive been confused on co-transport for ages and now i finally understand it !
This is so clear!!! Thank you for sharing.
thanks dude, really helped summarize it for todays exam>:)
wow you just cleared all my boubts.... thank you very much
Where does potassium go after?
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?
Hamzah413 Cell cycle, mitosis and meiosis vids all uploaded!
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
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.
Is there a difference between this video and the one with the same title that was deleted? Thank you!
thanks alot it's facilitated my study
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wow! Thank you sooo much for this video!!!!! I really didn't understand this at all before but now it makes perfect sense!!!
+Sophie Law Glad it helped!
where do the potassium ions go after the process ?
do they accumulate in the epithelial cells of the small intestines ?
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.
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?
Very well explained. Thank you!
Thank you very much. I think Sound level is very low. Anyway thank you.
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
Thank you .... Very well explained
+Mohammed Hameed shareef Cheers!
What about water transport from lumen into blood?
Isn't SYMPORTER a secondary transport, so an active transport.?
Thank you very much
very good explaination
Thanks bro, I get it now. So well explained
very helpful. a bsc nursing student🤗
thank you so much!
this was sooo helpful thankyou!! I have a test on unit one tomorrow and it feels really good to finally understand this 😁
It was a good one.
OMG YOU are amazing thank you!!
Thank you , very helpful!
I completely understand now!!
great vid buddy
Thankyou very useful
Thank you!
thanksss so useful for me
After digestion, during absorption isn't there more glucose in the lumen of intestin?
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
*But
Thanks
You are a god
can u please make video on unit 5 essay questions
2016 spec unit 5
😍
Yo lydia
You're a don
you are damn soft. i could barely hear anything??!
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.
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?
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.
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!
Great video! made this concept so much easier to understand. Greatly appreciated :)
thank you for that it was helpful but the sound is so low
Really helped, thank you!
Just discovered your channel... and I finally get this. Thank you!
Thankyou so much, I finally understand the topic for my presentation from your video.
your video was amazing thanks so much
The voice is not clear but great contant
Very much helpful... Thank you
Thanx very easy to understand 🤠
Sir volume is low😟
Awesome 👏 😎
Thanks!
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!
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
THANK YOU!!
Thank you very much! You saved my day
God bless you. Ty so much. XD
Thank you so much
Thanks bro
thanx
I'm glad someone taught me this because I was just given a worksheet and expected to know what to do. Life saver!