Cell Membrane Model Demonstration Using Dialysis Tubing
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- Опубліковано 13 жов 2019
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In this video, Mr. W demonstrates selective permeability using dialysis tubing, fructose-starch solution, and iodine solution. The video uses animation and explanation to demonstrate selective permeability and to connect it to the molecular characteristics of starch, fructose, and iodine.
This video can be used to help students master AP Biology Topic 2.5 (selective permeability) and it’s a part of the official AP Biology Diffusion and Osmosis Lab.
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link not working
Who's here for online school?
me dude my bio teacher is a struggle
@@mrstipizy2442 me too thank goodness for this man
Me lmao. What was y’all’s results? For science of course
meee\
Same. My teacher isn't explaining things correctly
why do u teach better my actuall bio teacher thank you for saving me from failing bio
Hi Prarthana,
If you need more support, consider my interactive website: it's like having a tutor that you can meet with anytime, at a fraction of the cost. Go to www.sciencemusicvideos.com and sign up for a free, one-month trial. Let me know if you have any questions.
Mr. W
I was just thinking the same thing
God bless this guy he just got me an A in my bio class. Thanks!!
Way to go, Elias! Try studying with the tutorials on my website, sciencemusicvideos.com
Yo, this is the best video on this lab out there, I've watched so many. Mr. W coming in for the WINNN. Definitely a great video! I cant believe I'm paying $1375 for a zoology class (which is online) and the best they could do for the online lab on diffusion was photos of the results that look like they were taken on an android.
I'd like to mention I came across this video because the questions on my worksheet are based on this video. We cannot currently perform our own experiments due to Covid-19, so this is awesome! Thank you for a great experiment.
u Tryna slide the answers?
@@nicolasporter4113 Oh man, that worksheet is turned in and forgotten now :D
I haven't yet finish the video, but I already get what he's discussing. This video is awesome!
Nice job. Thank you!
Used this to flesh out our homeschool bio kit experiment manual today. Thank you so much!
If you want learning support, check out my website: learn-biology.com/l-b_student-welcome/
Wow this was so helpful, no tutorial ever made it this easy to understand. I wish you taught at our college.
I'm at a high school!
Check out my membranes tutorials at sciencemusicvideos.com/apbio2019/
TWO WAYS TO ACE YOUR BIOLOGY COURSE: 1) Subscribe to my website, www.learn-biology.com, where you'll find tutorials on key AP Topics and comprehensive review materials. It's like having an on-demand tutor, 24/7. 2) Buy the BIOMANIA App, now available at the App store at itunes.apple.com/us/app/biomania/id1448110607. You won't believe how much biology you'll learn!
Awesome!!!Help me a lot in bio class. Thanks
This was very helpful! Thank you so much
I finally understand!! Thank you Mr. W!
Thanks for making me understand this .🙏
Sure thing, Aune. Check out the tutorials I have about to help you learn biology at sciencemusicvideos.com/apbio2019/
Let me know what you think!
Mr. W
Thank you so much Mr W
You're welcome, Madi. If you want to learn about membranes, go to the the tutorial at sciencemusicvideos.com/ap-biology/membranes-quiz/
I love this!
NICE JOB PROF.
It is very useful for me as a teacher to use your video during online time instead of a lab and use it in Ed puzzle to create a formative assessment. Thank you!
sir, can I have information where did you get the semipermeable membrane in this video? thank you
Thank You
Great visual explanation!
Thank you!
I would like to know the purchase information of the dialysis tube used in the video.
Very good video! What substances did you use in the dialysis tubing for starch and fructose?
Not sure what you mean. Besides starch and fructose?
@@sciencemusicvideos I think they meant the iodine
awsome professor
Thanks, Kim!
What pore size dialysis bag did you use?
Thanks
How does this late to the concepts of diffusion and osmosis?
why The dialysis bag turned dark blue/purple?
and why The fructose test strip turned positive when dipped in the solution?
What are the ingredients for this experiment?
Thanks man!
You bet!
How large are the pores in the membrane?
can glucose diffuse?
how big is a water molecule compared to starch iodine and fructose
Supposing we are going to use milk as the sample. Then if we test the dialysate for sugar and protein, which test will give a positive result?
I was starting to hate my bio labs until I saw this video now I dont feel so helpless lol
Plus my lab prof is a donkey that's putting it nicely
thank you
You’re welcome! Check out my tutorial at learn-biology.com.
I just did this project in my class and iodine is a really hard stain to get off glad I didn't get that on me
does anyone know what the iv and dv are please and thankyou :)
Can someone or anyone give me the answers for these questions that my biology teacher came up with
Questions:
1) What substance diffused into the bag from the cup? How can it do that?
2) What substance diffuses from the bag into the solution in the cup? How can it do that?
3) What substance cannot diffuse through the dialysis bag? Why not?
4) Why does the solution in the cup get lighter?
I would appreciate it if yall would give me the answers for this.
Mara; all of your questions are answered in the video.
I ripped my dialysis tubing what can I use in replace of the tubing?
did water diffuse through the solution from the cup into the bag?
Probably, but that’s not the point of this experiment. It’s really about tracking movement of the solute. Looking at the water change would be more about osmosis, and there are better labs to do that with
Is that process able to take over the color of dissolved coffee ????
Thanks a lot but I have a question
That is why there is no Color change in frutos solution?
i think the fructose didnt diffuse out of the dialysis tubing
yes
Yes!
You do not mention water movement in and or out of the bag. Any reason why? If you weigh the bag before hand it should weigh more after.
Only because this is a qualitative lab. I have another movie about osmosis in the works...but it won't be up until next year.
where did you get the dialysis bags?
I’ve gotten them from Carolina biological supply, but you can also get them from flinn, etc. Are you teaching a AP Bio?
how does the visking tubing differ from the cell membrane?
They're only similar in that they are both selectively permeable. Chemically, they're utterly different.
Would u talk about basic and molecular genetics, Mr W?😅
Definitely...but probably not soon enough for what you need. I do have tutorials about all of this on my website, and we're offering free trials: go to www.sciencemusicvideos.com.
Good luck!
Mr. W
@@sciencemusicvideos thanks Mr W.
what was the purpose of the test tube?
It's a control: something that's impermeable to everything. It also preserves the starting iodine solution so you can do a before and after comparison.
My teacher came up with this question:
How do you know that the molecules in this experiment diffused across the dialysis tube membrane and did not leak out or into the dialysis tube?
Can I get help please?
hey, I just thought if the contents were to leak then starch would appear in the iodine solution too however it didn't so maybe that would prove the leak and we would see fructose and starch apparent.
Root hair cell membrane absorb ink water by osmosis
Can someone please make a summary about this video
You didn’t say anything about water being permiable to the bag or not for 6/10 on my test:(
Thanks for the information teach, I am also now uncomfortable with this information, even though it will help me in class.
Why the fructose test strip turned positive when dipped in the solution?
can anyone explain why the solution in the cup after 24 hours is labeled as lighter red? it's obviously clear.
If I want to demonstrate this experiment during the class, how I could increase rate of osmosis? I've just 90 minutes, we cant wait 24 hours.
Sorry this comment is so late, but it actually occurs pretty quickly. You can probably get some visible results in 30 minutes.
Why the fructose test strip turned positive when dipped in the solution
Because the dialysis tube is selectively permeable to fructose. This means the original fructose that was in the bag is allowed to move outside the bag and into the water. An example of the opposite of this would be starch. The dialysis tube is NOT selectively permeable to starch. This means the starch that was in the bag is NOT allowed to move outside the bag into the water.
Bc there was fructosein the solution lol
pwedeeee ikaw nalng amon tetserrrrrrrrr
1:44 looks like his shirt changed color
MY G
you have officially saved my brain cells from committing suicide, thanks x')
Good to know! Keep those brain cells safe!
What do we do if we don't know anything about starch??????? 1:59
It's a polysaccharide. A big molecule. That's all you need to know.
@@sciencemusicvideos thanks :DDD
Someone summarize this
دكتور اريد ترجمه باللغه العربيه
I don't know why but this guy reminds me of Neil Breen
Marcus Veltri's dad.
i am so confused like wut?!
Hi Mr. W,
Check out my chemistry for biology tutorials at www.sciencemusicvideos.com/basic-chemistry-tutorials/
Let me know if you think they'd be useful to you.
Pipi Guy
go to 4:55 if you are here for bio
ty
Please arabe 😭😭😭😭no English . lam not anderstand your 🤝🏻💔😔. .