Osmosis and Water Potential (Updated)

[@AmoebaSisters]

UPDATE: Having a hard time with osmosis diagrams (like the one at 5:34) and understanding those terms hypertonic and hypotonic? We have a KZbin Short for that! kzbin.info/www/bejne/pKPadKl-rryeoKs We like to pin clarifications & corrections at the top of our videos! We are so appreciative of feedback we receive as it helps us continue to improve. In this video, we say the word "molecules" several times. Chemically speaking---the term "molecule" may be ok when referring to water but *not* salt. Salt is formed by ionic bonds [not *molecular* (covalent) bonds like you would see in water] so we removed that statement. We also had removed a statement regarding the size of salt affecting its ability to cross a membrane: this video does not mention that salt disassociates in water, so the fact that a salt compound is larger than a water molecule is *not* the correct reasoning. Just to add: in our cell transport video, we mention ions generally cannot travel across the membrane unassisted, which would be more relevant to this. We also notice in the comments that people have questions about the diagram at 5:34. Many textbooks, in our experience, focus on the solution the cell is placed in only. Our diagram at 5:34 actually labels both the cell (as either hypertonic or hypotonic) AND the solution (as either hypertonic or hypotonic). If assuming no added pressure, look for the area that is hypertonic. It may be the cell that is hypertonic or it may be the solution that is hypertonic. *But as the diagram shows, the hypertonic area (assuming no pressure) is where the net movement of water will go.* We try to include addressing the cell as well as its surrounding solution, because Pinky noticed her students otherwise tended to memorize terms corresponding to swelling or shrinking, which turned out to hurt understanding. Hope that helps! :)

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69 likes... nice

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Are you guys getting away with such basic knowledge that too in college? Here is +1, we have whole story related to transport in plants 😭

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Nerd

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Who else is studying for a test. Ap bio anyone?

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tomorrow 🙃

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Yeah good luck with your multiple choice test

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9th grade biology 😔

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9th grade honors bio

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My professor did as well and I'm glad she did. These videos are easy to digest

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69 likes... nice

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Can she be my teacher you literally taught me more in 9 mins than my teachers in 8 weeks

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i wish 😭

[@AmoebaSisters]

We love to create. At 9:22 in this video, we challenge you to create something- a comic? video? GIF? - that explains why excessive salt in the soil could harm plants in terms of this video's focus of osmosis. If you create something, we'd love to see what you come up with! You can find us on Twitter @AmoebaSisters. To see our milestones in our adventures in creating, visit www.amoebasisters.com/milestones

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Lol, I know the answer because I watched the old version of this video before this one came out. XD

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can you do about bank sperm?

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What software did u use to make to use this video?

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My college class made this so much more complicated than it needed to be. You guys do such a great job at explaining!!! I've been watching your videos since high school and you never disappoint amoeba sisters!

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You make science cute!

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It’s not cute it’s gross

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That fact that two random amoebas on the internet can do a better job of teaching than my teachers

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thanks to you guys, I can now understand SOME sort of biology... I've always been bad at memorizing, and the teachers at our school aren't that good with making us UNDERSTAND rather than telling us to memorize them. anyways, its 3 am here, and I'm studying biology for my exam tomorrow. wish me luck! :D

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Irshia haque how was it

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[@TomahawkH]

A fun way to demonstrate osmosis at home is with Umibudo (sea grapes.) Umibudo is packed in super salty water, which makes them shrivel up (by osmosis.) When you rehydrate them in fresh water, you can see them swell up as the water rushes in by osmosis! Osmosis right before your eyes!

[@istifed1760]

Absolute gold. I study for medical exams and I got confused by the term osmosis. I love when something is explained so simply that even a kid could understand. Thanks!

[@tyronehuff]

I found this video while researching the osmotic pressure in the fermentation of rum - if you use undiluted molasses, the sugar concentration can be up to 24% and yeast can't perform under that much osmotic pressure. This video was so helpful in really understanding what that phrase means!

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I still watch these even tho I learned this about a year ago, you’re videos are just so great! Always learning a few things even tho I feel like I know the subject!

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Thanks! Some of the easiest videos to understand.

[@AmoebaSisters]

Thank you so much!! We so greatly appreciate it!!

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How crazy is the an 8minute video helped me understand this better than my hour lecture.

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The best class i had in my life, thank you.

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have an exam in biology tmrw and this helps better than my actual lessons

[@blitzbanker5617]

thanks for clearing up my misconceptions, i was so freaked up coz sometimes professor would say from low to high and at other time he'd say high to low. now it's all cleared up we were talking about two different scenarios and point of reference were different, first being solute concentration point of view and the latter being solvent (water) concentration point of view. thanks again

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WE DID THIS TOPIC IN CLASS JUST THIS PAST YEAR I FEEL SO SMART FOR UNDERSTANDING THESE TERMS

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Hi Amoeba sisters! I'm an A level Biology student in the UK, and I watched your videos a lot when studying for GCSEs. Imagine my joy when I realised you cover A level topics! I love the art style (props to you, Petunia) and the explanations are superb. Thank you!

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Liked and subscribed ;)

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i do love the fact that teachers show us this video instead of properly teaching us

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This is one of the best videos to learn osmosis

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this video is so good if you are strugeling in class when learning about difusion or osmosis watch this vid i have my test tomorrow and it just saved me a load of time for studying

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3:42 I see that adventure time reference....

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Where?

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Nili Zack 1:03

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I try to really have a deep understanding of what I'm studying and it's been two days trying to figure this out and not just saying low solute to high solute, thank you!!!!

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Who’s watching this for studying for a test tmrw

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your videos helped me pass my community college bio class and now I'm at university studying general biology!! thanks

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5:58 so this is the moment where I realised the fish has a chanceto explode I laughed And then I thought: Poor fish

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Learned more in this video than in my entire hour and a half class. Thank you

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our substitute teacher was playing this in ap bio and she called this channel " a moe bee sisters" lol

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I literally got every answer in this video. Thankyou sooo much for making such videos. God bless you

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If all schools taught like this, we would all be less confused/overwhelmed.

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this is so much better to understand than actual biology lessons

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Did anybody else watch this at school? I LIKE WATCHING THIS

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I like how you demonstrate and those animation makes the explanation easy to understand ☺️

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Who else....? Who else....? OK for me am watching this so that i understand the topic,uk coz of COVID-19 stuff.*Who else is with me?

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This channel is so smart! I love your scientific explanations, they make it look so adorable!🥰

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I was watching the old osmosis video when you posted this. Oh, the irony.

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Irony. That's very funny.

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You may have passed Biology, but I don’t know how well you did in English...

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That's a coincidence.

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If I go swimming will I explode??

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Bro wth?

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My cousin did explode he was hypertonic and swimming in hypotonic pool I don’t know how he doesn’t know general biology 🤐😤

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@@icy3203 he just explode not a big thing he came back with mitosis

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This video was so useful for my homework. Tysm

[@pjx8155]

What is exocytosis btw

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When youtube instructs better than your professor

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Way of explanation + taking help of story and fthe best part animation all were literally awesome ❤❤

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Amoeba Sisters: Let me present the U-Tube... hm that is funny KZbin: I that is me :)

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I might just start watching these instead of listening to my bio teacher...

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Who's here from online class 👀

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The intro is a secret formula to enjoy the whole topic‼️🖐️

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You are science Ling Lings Ling ling 40 hrs... Oh and there's a tumbleweed snowman at 0:11. Tee Hee Hee

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