Countercurrent multiplication in the kidney | Renal system physiology | NCLEX-RN | Khan Academy
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- Опубликовано: 8 апр 2014
- Created by Raja Narayan.
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I do have to admit, I love your videos, but this needed to focus more on the counter-current. the balance.
Med school student here who wanted to clarify some past comments. This is a solid, basic video to understand countercurrent MULTIPLICATION w/ your typical cortical nephron. Most of the negative comments coming from people who were probably looking for an explanation about countercurrent EXCHANGE which is a DIFFERENT passive process dealing with the vasa recta and juxtamedullary nephrons
super late here, but bless this is the most helpful comment I've read in my history of RUclips
It may sound corny but you also have a very pleasant voice as well as tone. So it makes it even better to listen to your very precise and well presented videos.
thank you
Does he not sound like Justin Long?!
i have eargasm listening to this silky smooth voice
😊😂😅😅
i just want to say thank you, i had such a hard time in my anatomy class understanding the physiology of the nephron loop, you explained it well! thanks again
i just spent the past couple hours watching all of the excretory/urinary system videos. so clear and detailed. just wanted to say thank you!! they are very helpful and just gave me such a more clear understanding of this system!! :)
You're incredible- thank you! remembering the names is the hardest part, the repetition and explanation of why things get their names e.g. proximal convoluted tubule is so helpful! Thanks!!
theres no actual explanation on countercurrent mechanism here at all......
thank you for saving me some time
the descending and ascending loops have different permeability. The ascending allows for solutes to move out into the the medulla space which, in turn pulls (through osmotic pressure) water from the descending tubule. This causes the filtrate to become more concentrated as is moves down the loop and less concentrated as it moves back up. This is all happening while the filtrate is moving so it has a multiplying effect. Hope this explains somewhat.
sure was waiting for something like that.... thank you
why does the concentration of filtrate decrease as it moves up the ascending limb of the loop of henle though?
Joel V George, the concentration of the solute decreases as it moves up the ascending limb because solutes such as Na, Cl, K, are removed from the fltrate via active transport
I've watched several of your videos and I am so impressed. I'm thankful for the simple explanations of what can be complex subjects. Fantastic teacher!
I'm so attracted to your hand writing
you should call it click writing
Of all Khan's video lectures ... This guys are the very best!! To the guy who facilitated this video, Thanks for being so awesome at teaching.
The title is a misconception. I was waiting for the countercurrent mechanism explanation
This was an absolutely beautiful video. I have scoured the web looking for information about the urinary system and this was the absolute best! Thanks again.
TY for saving me from mild panic while I tried to make heads or tails of this thing for my exam.
Saved me at least 5 minutes of internal sobbing
Genius, you managed to explain me what the profs at university couldn't. Big compliment for your work, I really appreciate it!
One of the most helpful science videos that I've watched! My teacher will be asking about countercurrent multiplication today - now I'll be ready.
The juxtaglomerular apparatus ( Macula densa) forms when the " thick portion of the ascending limb of Henle" passes through the vascular pore, not the distal convoluted tubule, because the distal comes actually after the macula densa.
This video gives a nice overview of the nephron tubules, even when it doesnt really expalins the countercurrent multiplication.
really need to include the vasa recta, which is where the actual "multiplication" comes from.
agreed
exactly!
isn't it that at vasa recta countercurrent exchange happen not multiplication
Exactly
only the best works at khan's academy. i have so much respect for mr khan for hiring only the very best.
I was having a hard time trying to understand the counter-current mechanism, but this video made it crystal clear. Thanks a lot!
Thank you so much! I initially got confused with what you mean by reasorbed. Either you talk about being reasorbed by the tubules or the body. But, I get it now. So thank you so much!
THIS WAS BEAUTIFULLY EXPLAINED. THANK YOU!!!!
Taught this better than my teacher
+Anchor BRO OR....he's just a bad teacher who isnt very good at teaching lesson so that it's easily understood *sigh*
+SlimTribe Tell me about it. My teacher basically ends up confusing us more....tsk tsk.
This is very well explained. Best I’ve seen on RUclips. By the way I teach A&P so I know what I’m talking about
Thank you so much! You made learning for my test so much easy! :)
My comparativ anatomy exam is tommorrow, and thanks to this video I finally get the freaking nephron! Yay, thank you!
+TheHappyTears goodluck
This helped more than any other video's i've found. THANKYOU :D
subscribed: checked! So glad I found your channel, your explanations are extremely helpful and detailed!
This is such a good video, thank you very much. I could listen to you all day bro.
If only I had seen this earlier.... It's really well explained!!
Thanks so much for helping me study for my bio IB exam!
Thank you so much!!! your videos really help me to understand all concepts
your explanation is amazing
This is a great breakdown of how this works, thank you!
great explanation, really like it, thanks a lot!
That was the best explanation I found on youtube so far!!
The only advice I would give on this video is to add the significant hormones that cause reabsorption in different parts of the nephron. That way, students can pull in the endocrine system and get a better understanding of how the renal, endocrine and cardiovascular system all connect. That would be more of MCAT style thinking... But great video.
+Amanda Strong Yes, completely agree! Hormones are so heavily involved in maintaining homeostasis. Would be beneficial to hear about renin, aldosterone, etc.
Such a fantastic and well explained video! THANK YOU!!!
This video is great! Thank you so much! made it super easy to understand! ^.^
I must respect Khan Academy ....They explain detailed topics In such a simple manner and I thought tht these Topics were too Hard to grasp it😢..I would donate to khan academy
thank you very much Khan Academy..... what is being explained here is just what our lecturer teaches us, I am starting to think that maybe our lecturer watches your videos before they come to teach us.
You're great!!!! Thanks for sharing your knowledge!!!!
this video is so impressive. my friend's father is suffering from kidney failure. He also took dialysis. I told him about Dr. Vikram Chauhan. He took treatment from DR. Vikram now his health is much better.
Such a great video with what I need to know for my final. Thank you!
Wow these videos are well explained and are super clear!! Thank you KHAN ACADEMY 🙏💕
Amazing and very well explained videos .
Extremely helpfull for students
Great explanation! It really helped! Thanks Khan Academy ..
fantastic video, great programme and so interactive. Brilliant teaching method and delivery with your speech. HD.
Thank you!!
I can't even tell you how much your video's have helped me. Thank you, thank you, thank you. :'(
I finally understand all of it! Thank you!
Your handwriting is beautiful :)
Thank you for your videos as well :P
Good overview. My understanding of the vascular support of the nephron is different however. I understood that the afferent arteriole split into 2 vessels, the peritubular capillary and the vasa recta. The peritubular capillaries are localised to the cortex, where they take up solutes and water reabsorbed by the PCT and DCT. Most of renal plasma flow passes through these vessels. However a small proportion of the blood from the afferent arteriole is sent to the medulla in vessels known as vasa recta, in order to take up the solute and water reabsorbed by the loop of Henle. This is important as the generalized vascular support structure illustrated in the video above would quickly dilute the medullary interstitium (as the salty interstitium would draw water out of these vessels). Hence blood supply to the medulla is necessarily poor.
Wow beautiful explanation. Thank You Sir.
this is great thank you so much! which is the second video you mentioned which talks more about the juxtaglomerulus apparatus? i cant seem to find it :(
Thank you so much, your explanation was great.
Amazingly helpful!
I loved this video, thank you!
Really Helpful!! Thank You
Excellent video, Conceptually very clear...
I love watching English-spoken videos with only knowing the body parts in my native language
Very helpful!
Thanks for that great information!!!
awesome explanation sir...thank you
oh god I was like trying to understand it from 2 days from my textbook but it just took 10 mins to understand all this stuff thanks a lot
Are you Enrique Iglesias? Because you're my hero.
Easy to understand the concept.good
Thank you, really helps :)
helped me a lot . thanks
Awesome man.
So helpful. Thanks a lot.
Thnk God finally I have counter current mechanism
Wonderful explanation!
I can't never understand like this thank you sooooooooomuch really thanks
LOL to be peed away. Thanks for this video it helped a lot!
I LOVE YOU FOR THIS VIDEO!
I absolutely adore your handwriting!
Excellente video and thank you!! 💚
Thank you so much for the explanation. 😁
Amazing!!!!
Khan academy coming in clutch 🙏
The loop of Henle is now called the Nephron loop. at least thats what they are teaching in universities now. But this is a brilliant video I finally got my head around this system
thank you. i am taking my ap bio test in 2 days. the book doesn't make sense to me but this video saved me. THANK YOU
nice video .helped me a lot
The Afferent Arterioles branch off from the Interlobular Arteries not directly from the Renal Artery
Thanks a lot, really nice video...
I want to share a scientific kiss with this man
sobster123 HAHAHAHAH
😂😂😂
thanks its very useful
Very good stuff man
Thank you so much!
WOOO NEPHRONS
helps me a lot
Great handwriting and explanation!
Great really thanks 😄
Great jobb!!
thank you sir !!
Fantastic ..♡
thank you!
The reabsorption arrows for Na and Cl ions are confusing in ascending limb. Besides that it's a good explanation. Thank you.
Nicely done! However i read in Junquiera's Basic Histology that 65 % of the water is reabsorbed in the proximal tubule. Almost 100 % of the glucose, the vitamins, the small proteins and the aminoacids get reabsorbed. About 85 % of the ions as well.
The thin segment of ascending limb should be facilitated diffusion while the thick segment of ascending limb carried out active transport
good explanation skills. (y)
Nicely described❤