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Diffusion and osmosis | Membranes and transport | Biology | Khan Academy 

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Learn about diffusion, osmosis, and concentration gradients and why these are important to cells.
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15 сен 2024

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Комментарии : 796   
@mcl720
@mcl720 8 лет назад
0:00 solvent review 2:28 diffusion introduction 6:29 diffusion with solutes 8:16 diffusion vocabulary 10:55 diffusion with membrane 17:12 osmosis
@apollo193
@apollo193 8 лет назад
Thank you so much!!!
@gaiusmarius4112
@gaiusmarius4112 8 лет назад
Vielen dank
@Daevoz
@Daevoz 8 лет назад
thx
@okoyechioma690
@okoyechioma690 7 лет назад
Mitchell Lenneville thanks .....I sometimes don't like how he beats about the bush without going straight to the point
@alyssamarie3527
@alyssamarie3527 6 лет назад
Mitchell Lenneville I love u
@itsmesebah832
@itsmesebah832 8 лет назад
I've learned more in this 19 minute video than the entire hour with my bio teacher, thanks.
@nataliev5165
@nataliev5165 7 лет назад
lmao same
@vasishthaserrattan3276
@vasishthaserrattan3276 7 лет назад
it's me sebah! same here
@AngelAngel-rg1wd
@AngelAngel-rg1wd 7 лет назад
same here
@alisaiem5941
@alisaiem5941 7 лет назад
Exactly
@demetriotorres1210
@demetriotorres1210 6 лет назад
it's me sebah! 2 weeks
@callessantana2688
@callessantana2688 8 лет назад
God bless the Whole Khan Academy and its lecturers/providers. You are making this world a better place. Planting hope into the youth by educating them
@elfadilfado7259
@elfadilfado7259 5 лет назад
true.
@anycolouryoulike8567
@anycolouryoulike8567 3 года назад
true.
@ch0s0_lvr
@ch0s0_lvr 11 месяцев назад
true.
@reef99red
@reef99red 9 лет назад
Lol, "hopefully you found that useful and not totally confusing". Are you kidding? That is the clearest, least-confusing, explanation i could ever imagine.
@rolandoperez6612
@rolandoperez6612 7 лет назад
reef99red EXACTLY
@BEV_shorts
@BEV_shorts 10 лет назад
Osmosis is the diffusion of water as a solvent from a low concentration of solute to a high sconcentration of solute, through a semi-permeable membrane. thanks sal!
@toober57
@toober57 6 лет назад
I just needed your comment. Thank you.
@mosesjonathan9168
@mosesjonathan9168 4 года назад
Thanks for making me Understand the more
@nvngkhinpang2076
@nvngkhinpang2076 3 года назад
thank you most for this hehe.
@iwannadie1861
@iwannadie1861 3 года назад
Tyyy ❤️👀
@Fulanito-tf9ee
@Fulanito-tf9ee 2 года назад
Thankss
@wrkin90044
@wrkin90044 9 лет назад
They weren't kidding when they said Khan Academy is good at explaining things!
@johnapplepeed
@johnapplepeed 3 года назад
?
@iwannadie1861
@iwannadie1861 3 года назад
Yep but who
@mypeaceluv3
@mypeaceluv3 11 лет назад
I cant even tell you how much this helped me. My biology teacher does this thing where she zips through the notes in a week and then gives us problems on the test we didnt learn. This makes it so simple for me to understand, breaking it down like this. your amazing, thankyou.
@DyslexicIm1
@DyslexicIm1 12 лет назад
You learn more from this guy in 18 minutes then what you learn in a week at school. Thanks.
@rougeassasin5701
@rougeassasin5701 2 года назад
A week? Dude I am learning IGCSE Biology and my teacher "covered" the whole chapter in 45 minutes and I am still confused.
@esi8285
@esi8285 7 лет назад
i swear,you are the best teach ever! my biology teacher is good,but in these cases where i wasnt in class and i have no idea hor to explain these stuff to myself,youre a life savior. god bless your soul!!!
@aishwaryajayan7687
@aishwaryajayan7687 9 лет назад
You've got a fun way of explaining things without losing the boudary!!!I have understood topics in a much better way!!!You're the best Sal!!!
@OliviaPlunkett
@OliviaPlunkett 10 лет назад
My teacher should just show this and save himself the confusion and time of making a lesson. I literally learned more from this short(ish) video than I did from a whole biology unit. This was a great test review too!
@annmaryabraham7322
@annmaryabraham7322 3 года назад
idk why but i just love how colorful the whole thing is, its one of my favourite things about these videos tbh
@alisakhan96
@alisakhan96 10 лет назад
i just love the way this person makes a difficult topic simple
@godschild9071
@godschild9071 10 лет назад
Omg thank you. You made everything so clear I was not confused at any part of the video gonna ace tht test tomorrow.Thanks :)
@adrianhutanu6181
@adrianhutanu6181 10 лет назад
same, this does really help
@YoungRippa
@YoungRippa 6 лет назад
yes
@wasiantalks
@wasiantalks 4 года назад
did you ace it
@faisalahmadshaikh9499
@faisalahmadshaikh9499 3 года назад
@@wasiantalks aren't u 6 years late?
@cobiobrien3038
@cobiobrien3038 10 лет назад
Wow I've been watching videos all day to study for finals. But your videos are by far the most clear and easitest to understand. Thank you so much
@iwannadie1861
@iwannadie1861 3 года назад
Wow this comment was 7 years agooo 😂💀👀❤️
@maddimaher6367
@maddimaher6367 8 лет назад
Wow I might not actually fail my test tomorrow
@dora42
@dora42 8 лет назад
Ha me2
@rachelreynolds3326
@rachelreynolds3326 4 года назад
I really like him as a teacher. He repeats words when he’s talking.
@carendavis7426
@carendavis7426 8 лет назад
Thank you! After hours of textbooks, notes, and lectures, it was majorly confusing. But your nineteen minute video? Completely makes sense now.
@ifiehill1789
@ifiehill1789 10 лет назад
God bless you. That really helped a lot. My biology teacher was really confusing but you straightened it out.
@soxpuff
@soxpuff 12 лет назад
You introduce concepts WAY better than my teacher. This 19 minute vid was concentrated with clear information and I understood much more than when my teacher spends an hour jumping from concept to concept.
@meganw4375
@meganw4375 9 лет назад
This helped me alot.....My biology teacher is a terrible teacher and doesnt know how to explain things!!
@savagegamerhd1106
@savagegamerhd1106 8 лет назад
+megan wehlmann same
@catherinewilliams3213
@catherinewilliams3213 8 лет назад
Same useless
@omarspectic
@omarspectic 8 лет назад
+megan wehlmann same
@kiwi-sk3eo
@kiwi-sk3eo 7 лет назад
Ohh mine too ='(( !!!
@lakiahmed5395
@lakiahmed5395 5 лет назад
@@kiwi-sk3eo mehh 3
@ajlakameric2684
@ajlakameric2684 3 года назад
honestly, this is one of the rare videos on the channel where everything was overly generalized, and the explanations were not-so-amazing
@ilovebiriyani101
@ilovebiriyani101 12 лет назад
I take Bio in 8th grade so it makes things harder to take it earlier. What makes it worst is that our teacher CANNOT TEACH. Instead of showing examples, all we do is take notes. After watching this video it enhanced my knowledge of diffusion and osmosis. Its SOO much easier now and less complicated. If I had Sal as my teacher my life would've been SO MUCH EASIER.
@iwannadie1861
@iwannadie1861 3 года назад
Wow this comment was 8 years ago...wooo
@ilovebiriyani101
@ilovebiriyani101 3 года назад
@@iwannadie1861 I'm in college now and nothing has changed since this comment loool
@Sapphiirex
@Sapphiirex 10 лет назад
Very clear and straight forward; thank you so much! I finally have a clearer understanding of this topic for school.
@TheCreativeNick
@TheCreativeNick 5 лет назад
7:42 *Balanced, how all things should be.*
@maureenmccormack5989
@maureenmccormack5989 5 лет назад
I have a test on cells, heredity(etc)tomorrow couldnt remover anything about this. Super helpful. You explained ThisWAY better than my science teacher ever could
@reynahdz9647
@reynahdz9647 10 лет назад
Wow great vid! why can't all teacher be like this guy???? =(
@AJJUCAS
@AJJUCAS 5 лет назад
He is.
@MelTee38
@MelTee38 5 лет назад
Your video helped me soooo much to finally understand diffusion and Osmosis!! I'm studying for my CCHT test and these are the related questions I had the hardest time with.....until you explained it in a way I could understand. Thank you so much!!!
@letsshaketheworld
@letsshaketheworld 13 лет назад
You just saved me an hour of studying notes into 20 minutes! I love this!
@Bernadettefull
@Bernadettefull 14 лет назад
A little long winded but I like the repetition - makes good for test prep. You have a nice voice too which makes it easier to keep listening. Thank you.
@herbpixie
@herbpixie 13 лет назад
Thank you! Doing an anatomy and physiology experiment on osmosis and diffusion tomorrow, and I now have a much better understanding of the principles behind it.
@netanel296
@netanel296 10 лет назад
I always found osmosis really hard to understand but you made it a bit more clear to me, thanks.
@lisatavor
@lisatavor 10 лет назад
I absolutely love your videos! After reading text book information and struggling to retain it, your videos have helped seal it into my brain and pretty much saved me (the exam will prove my theory anyway!!! Cheers!
@heyandreww
@heyandreww 12 лет назад
this helped me out a lot! Thank you for taking the time to thoroughly explaining Diffusion and Osmosis! I didn't understand my professor at first but I got it after watching this video. Two Thumbs Up!
@SyedHousein
@SyedHousein 8 лет назад
Just looked this over for my first quiz in Anatomy and Physiology 2. Thank you for this explanation!
@yatogami2919
@yatogami2919 7 лет назад
Doctor Syed same but for A and P 1
@R4ZOR_BL4DE
@R4ZOR_BL4DE 3 месяца назад
this has to be the most clear explanation of diffusion in my life.
@littlesadlerable
@littlesadlerable 12 лет назад
*mindblown* why can my teacher teach it this simply
@ProfessorPeasant
@ProfessorPeasant 11 лет назад
In the first 4 minutes alone, you taught me more than my teacher could manage in a week. Exceptional, subscribed :)
@Priyanka-ir2tb
@Priyanka-ir2tb 10 лет назад
where ontario teachers have failed to teach students properly, you have come in and done their job, so thankyou!
@MCzoom1357
@MCzoom1357 7 лет назад
i have been very sick for almost two weeks, and the day i get back I have to take a test on this. My class has been going over it for two weeks, so I had to learn it all in one day. I watched this video and got an A on the test, while everyone else got a b-c on it. Thank you so much.
@brittani.alyssa
@brittani.alyssa 4 года назад
I have been reading about semi permeability, diffusion, and osmosis for nearly two weeks now. I felt like all my resources were giving me conflicting responses. I get it now!!!!!!!!!! :)
@emptypockets413
@emptypockets413 11 лет назад
i really like the way you break down the subject matter for non-bio nerds. sending a big thank you to you!
@IshrakAnjum
@IshrakAnjum 11 лет назад
I have a test tomorrow on this topic and this video really helped me understand what osmosis and diffusion is. It actually helped me by looking at the drawings . I also found it interesting. :-)
@estebangutierrez4316
@estebangutierrez4316 10 лет назад
me too
@IshrakAnjum
@IshrakAnjum 10 лет назад
ok, hope you all did very well :)
@estebangutierrez4316
@estebangutierrez4316 10 лет назад
thanks!
@richardhobson197
@richardhobson197 10 лет назад
Brilliant Video!! Really clear to understand.
@vpcreationsunlimited
@vpcreationsunlimited Год назад
HI Sal, I've been watching your videos since your started and now still watching....I love your channel and I am learning so much for Anatomy and Physiology than listening to a boring lecture for 3 hours !!
@pinkcherryblossomful
@pinkcherryblossomful 11 лет назад
we spent a week trying to learn this and my i didnt understand.... now i just learned it in less than 20 minutes. how about i just drop out of school and just watch khans videos all day?
@XdjwolfX32
@XdjwolfX32 9 лет назад
Thanks! You're very well at explaining scientific things! It was very helpful because I was gone the day of school that we talked about that, and I really understand it now! Thanks!
@EmoKittyhumor
@EmoKittyhumor 9 лет назад
Cuz we were forced to learn about this in science...😑
@XdjwolfX32
@XdjwolfX32 9 лет назад
-Emo Kitty- :P
@hindal-balushi5788
@hindal-balushi5788 8 лет назад
Me too
@whatrtheodds
@whatrtheodds 6 лет назад
I'm studing at home and was ment to go on a break, but i was actully enjoying your teaching style so much i watched into my break, so clear, thankyou so much!!!! You rock.
@superladybree1432
@superladybree1432 10 лет назад
Thanks so much I have been in class 5 weeks now and I have learned a lot but; diffusion and osmosis kept going over my head but with your help I GOT IT ! God Bless you !
@kirztenabbyo.bautista5615
@kirztenabbyo.bautista5615 2 года назад
Thanks for clearing my confusion about this topic. You made it easy to understand, thank you Sal!
@Mafieldgirl13
@Mafieldgirl13 12 лет назад
Thank you so much! I don't comment on videos but I have to thank you. My biology teacher this year makes no sense! please don't ever stop making videos.
@aodhanlynch9462
@aodhanlynch9462 11 лет назад
Yay an adult who has took a biology degree and can teach unlike my biology teacher who relies on textbooks and the internet
@Gucci19zoo
@Gucci19zoo 9 лет назад
that's the best lesson i've ever seen in my life, with colors and clear explanation smooth voice wow wow wow c'est vraiment le top du top
@Nicasweets23
@Nicasweets23 11 лет назад
THANK GOD for Khan Academy, I have a biology test coming up and was so lost. I watched this video and it makes sense, keep doing your thing, Saul!
@YesForNo
@YesForNo 12 лет назад
The thing is that english is not my language and I clearly understand what he's saying. I just listened all proces of photosynthesis and I feel illuminated about it.. Now I'll explain it to my teacher :D
@vanessaescalera4117
@vanessaescalera4117 5 лет назад
wow that was a whole lecture in 18 minutes. amazing. this is why i donate lol. AMAZING!!!!!!!!!!!!!!!!!!
@david1401170
@david1401170 12 лет назад
gosh this guy explains everything with such ease and simplicity. its awesome
@hellokittyx958
@hellokittyx958 12 лет назад
After watching this, I got 90% on Osmosis and Diffusion test. Thank you!!!! Credit definitely goes to khanacademy!
@ouiemfrs4373
@ouiemfrs4373 4 года назад
I love it when he just calls a molécule 'this guy' ")
@cochran3369
@cochran3369 13 лет назад
this was awesom! so helpful! i was all upset bc ur teacher required us 2 watch this but it was acually helpful!!!!!!! THNX!
@Msalazar20100
@Msalazar20100 12 лет назад
u make everything make sense.. i bet if i watch all of your videos i would ace my bio class
@kennethbarrancas5068
@kennethbarrancas5068 2 года назад
the Khan Academy guy know everything💯
@NoxMedicant
@NoxMedicant 12 лет назад
please, please, PLEASE ! make more biology videos!! superb explanations..
@Kcrossman6
@Kcrossman6 14 лет назад
im a year 9 (form 3) in New Zealand, Mount Maunganui College and I just wanna say thanks. that was reaaaally handy, it will help me loads in my exams.
@DracoonTheDarksigner
@DracoonTheDarksigner 11 лет назад
How does he learn EVERY SINGLE subject that I need help with? He always has exactly the subject that I need.
@nicolepowers5935
@nicolepowers5935 11 лет назад
I have read this several times in my A&P book and saw several videos and did not understand.. This video totally makes sense. THANK YOU!! : ))
@junk11111111
@junk11111111 13 лет назад
At his website it lists out the university level courses (science, math, computer science, etc) in a more organized listing than looking through here on youtube. Very straightforward links from there back to youtube.
@AnEscapedMind
@AnEscapedMind 14 лет назад
Excellent video. You teach on the level of genius because your vision is high enough to fully understand the topic and you are able to downgrade, or lower, or descend into the thoughts (previous visions) that created your highest vision.
@XxsuperstudlyxX
@XxsuperstudlyxX 11 лет назад
I thank you so much for going into detail as to why all this stuff happens, my brain won't just accept that something just happens and that's the way my teacher explains it, but you take more time to explain why it happens, why diffusion occurs the way it does and it helps me a lot and helps me comprehend it better :) thank you
@MrMcBruisycheeks
@MrMcBruisycheeks 13 лет назад
Thank you, this really helped. I liked how you explained exactly why the solute goes from high concentration to low concentration until equilibrium is reached. I never understood that part. The illustration that was particularly helpful to me was the one of sugar molecules blocking the openings in the membranes.
@rolandoperez6612
@rolandoperez6612 7 лет назад
I love you. I watched this 45 min before taking my bio quiz. Please keep doing this. Is there anyway I can support? This is free and I learn more from you than I do in College.
@lofiwithshamique
@lofiwithshamique 3 года назад
this is the first time ive been able to understand this topic!!!! THANK YOU
@lightermcqueet3977
@lightermcqueet3977 6 лет назад
I have a question, could sugar be considered the solvent as well if there was more of it?
@cmac6551
@cmac6551 8 лет назад
This helped immensely. flunked my last test on this but retaking it soon. Im sure this helped!
@Talafenon
@Talafenon 11 лет назад
Very nicely done, my 5th grader now understands Osmosis and Diffusion. This is much better than I could have done and he is now excited to do his science project for school.
@arnavvishwakarma7734
@arnavvishwakarma7734 8 лет назад
Thanks for the help!
@shai2905
@shai2905 7 лет назад
superb awesome vid. explains osmosis in clear terms!
@DestinyWilson001
@DestinyWilson001 12 лет назад
NOW I understand when my teacher mr.hans does it I don't under stand
@angelaloureiro6318
@angelaloureiro6318 10 лет назад
Thank you so much:))))) I have a test tomorrow and now this finally makes sense
@atamme2010
@atamme2010 12 лет назад
I have some questions,please 1- Why doesn't oil mix with water according to the idea of diffusion? 2- What does osmotic pressure mean? 3- If sugar molecules blocks water molecules inside ,why don't they block water molecules outside the semipermeable membrane?
@pinksplodge886
@pinksplodge886 8 лет назад
This is a brilliant video. Loved the black background- found it helped with focusing on your diagrams. Many thanks!
@baileyedwards4530
@baileyedwards4530 10 лет назад
gazillions is the technical term
@prettyreckless2700
@prettyreckless2700 13 лет назад
i study english at uni so nothing scince related however i love learning about science in my spare time and these colourful videos are awesome for that so thanks a lot!
@Jsuriano
@Jsuriano 14 лет назад
OMG you're so easy to understand, I so totally subscribed to you, I'm a visual learner and this right here is perfect, I love it because you explain it in its simplest form.
@andrina926
@andrina926 13 лет назад
GOD bless you! I was so frustrated with this chapter and you have have explained it so simple and clear. You saved me! thank you soooooooooooooooooooooooooooooooooooooooooooooooo much
@EuphoricFrenzy
@EuphoricFrenzy 6 лет назад
wow all of a sudden everything makes more sense. thanks khan academy!
@debaixodocobertor
@debaixodocobertor 9 лет назад
Oh my God I have a bio test tomorrow and I was freaking out because I couldn't understand osmosis and diffusion. This was one of the best classes I've ever had, thank you so much!!!!
@MiaLilly
@MiaLilly 14 лет назад
It is not confusing but very helpful :D Thanks so much..This is probably the first time I understand what Osmosis or Diffusion is! ..I didn't understand anything what my teacher tried to explain me :)
@lauren8charlotte
@lauren8charlotte 14 лет назад
nothing has ever helped me more than this video right here. thanks soooo sooo much :)
@JAMiSHNeSS868
@JAMiSHNeSS868 11 лет назад
what you are doing is amazing ! I personally appreciate that you take your time to explain this ! I hope you love what you do.
@andrewainger
@andrewainger 12 лет назад
Thanks two questions: (1) I understand Sugar but what about salt? Will it work? Well of course it will, BUT, when the solute is placed in solution, we get Na+ ions etc and these are real small, so why don't we get these ions traversing the membrane? (or have I misunderstood) (2) Einstein said we can never create or destroy energy, so if osmosis increases the pressure on the hyper-tonic side, where does the energy come from? (Does the temperature change or what?) Thanks . . . AA
@EternalAllureX95
@EternalAllureX95 12 лет назад
I hope watching these videos will help me get a 90 or above on my bio exam which is in 2-3 weeks!
@maddiefossitt1207
@maddiefossitt1207 10 лет назад
I have quiz on this topic on Wednesday for my high school bio class and this really cleared up my confusion. Thanks!
@iLordNooob
@iLordNooob 12 лет назад
Bio Exam Tomorrow Thank You So Much! You are a LEGEND! May God give You A Prosperous Life
@SamiaNutritionistphsiotherpist
@SamiaNutritionistphsiotherpist 3 месяца назад
This is the kind of video that really deserves a like, subscribe and a comment not that cringe videos I HOPE I PASS I HAVE A PAPER TODAY ACTUALLY WISH ME GOOD LUCK 👍 🙂 🙃 😩 😪
@SamiaNutritionistphsiotherpist
@SamiaNutritionistphsiotherpist 3 месяца назад
What even is this guys name, such a legend
@darthrain875
@darthrain875 12 лет назад
I LOVE YOU. i understand these videos so much better than my professors at my university
@GrimSoul66
@GrimSoul66 11 лет назад
good video, it's not that this confuses me, it's more about exposing myself to the labels so they stick in my brain.
@meg3421starofworld
@meg3421starofworld 12 лет назад
Thank you... I had many doubts but now they are all clear.. Thanks a lot... Just AWESOME !!!
@tylerkowtatv
@tylerkowtatv 12 лет назад
I love these video they make it so much easier since it is confusing in my class
@belligerentbeagle
@belligerentbeagle 10 лет назад
Oh thank you!!! You helped me so much..... Have been sick and missing classes but now I can catch up!
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