TRANSPORT ACROSS MEMBRANES: A-level Bio. Simple & facilitated diffusion, osmosis & active transport
ฝัง
- เผยแพร่เมื่อ 28 มิ.ย. 2024
- Learn the four main methods that molecules are transferred across a membrane. In this video, I go through simple diffusion, facilitated diffusion, osmosis and active transport.
Download my FREE GUIDE - How to analyse your tests to skyrocket your grade! missestruchbiology.mykajabi.c...
**JOIN MY BIOLOGY CLUB***. Need an A/A in Biology and get bored easily and procrastinate??? Join my Biology Study Club for resources, support and a social community to get you to that A*! missestruchbiology.mykajabi.c...
Try my resources to improve your skills and grades:
1) Try my FREE resources www.missestruch.co.uk/freebies
2) THE COMPLETE A-LEVEL BUNDLE www.missestruch.co.uk/offers/...
2)FULL A-LEVEL ACTIVE RECALL WORKBOOK
www.missestruch.co.uk/offers/...
3) A-LEVEL NOTES
www.missestruch.co.uk/offers/...
→ For more revision videos, try watching my ENTIRE topic videos:
• A level Entire Topic V...
___________________________________________________
--A-level--
* AQA A-level Biology textbook (this is what I use at my school)- OUP amzn.to/2MWiFvY
* CGP revision guide amzn.to/36B26h7
* CGP workbook amzn.to/39A55YZ
* Maths skills for A-level Biology amzn.to/37GaHPI
* Synoptic essay book amzn.to/2ukHQ4Y
* AQA A-level biology practical skills guide amzn.to/2FkUSSn
* A-level Year 1 workbook amzn.to/36s8EhE
* A-level Year 2 workbook amzn.to/2QqpmIY
Image credits
commons.wikimedia.org/wiki/Fi...
commons.wikimedia.org/wiki/Fi...
commons.wikimedia.org/wiki/Fi...
commons.wikimedia.org/wiki/Fi...
en.wikipedia.org/wiki/Passive...
commons.wikimedia.org/wiki/Fi...
Music: Soho - Riot • Soho - Riot (No Copyri...
DISCLAIMER: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission. There is no additional charge to you!
![ความรักของยักษ์เขียว (ทศกัณฐ์) - เดี่ยว ไออุ่น [OFFICIAL MUSICVIDEO 4K]](http://i.ytimg.com/vi/yCCy-QVHqK8/mqdefault.jpg)
My exam is tomorrow and I don’t know what I would have done over the two years without these videos. THANK YOU SO MUCH!
Hello Miss Estruch,
I just wanted to let you know how incredibly helpful your videos are. This is probably the most helpful channel on youtube when it comes to A-Level biology. Thank you so much for the amazing content!! Its very much appreciated by me, a new year 12 biology student.
Hi Aliyah,
Thank you for such a lovely comment. Really pleased to hear they are helping you at the start of your A-levels :D
Four days till my exams and I just wanted to say you literally saving me . Your following l the spec points and not going into extra detail which is amazing for last minute revision. Going to look into your other videos . Fingers crossed I do well on my upcoming test . YAAAY
Good luck for your exams Emma 🤞🤞🤞
Really pleased they are helping you! Check out the exam paper tip papers too if your exams are being modelled on typical papers.
How did it go?
whos here before bio exam tomorrow?
Me
@@Fostinah-uf6nhsamee😢
More like bio exam in half an hour 😫
good luck
Miss I don’t even have any words to express my gratitude. Like your videos help sooooo much more than you could possibly imagine. To read the chapter in the book, takes hours and I don’t understand nothing much. But your videos make me understand ALL that’s included in my chapters, (even more than what’s in the book which helps me understand the book content better) that too in a very short time!!! Honestly, thank you so so so much.
oh wow! Thank you so much for your message. I'm so happy that my videos are helping understand to well 😁😁😁
Textbooks can be soooo wordy and extra info, that's why I made my concise A level notes covering only what is needed
This does put a smile on my face
Your videos are actually saving my grades, thank you so much for taking the time to make them!!!
Aww thank you! So pleased the videos are helping you.
Good luck :D
My year 13 biology mock is tomorrow so I'm really hoping I've done enough to get my predicted grades, thank you!
Fingers crossed for you 🤞
i wish i found you earlier, your helping me out big time! the best youtuber for biology
aww thanks Kylie, so glad you are finding the videos so helpful! Best of luck with your studies! 😊
So is a phosphorylation reaction an example in the membranes. When molecules (ie glucose) bind to the carrier proteins, ATP is hydrolysed into ADP and Pi, and that Pi attaches onto the carrier protein causing it to change shape.
Hi Love your videos! May I ask whether you go over the beetroot experiment in any of your videos? or a video on the experiments needed for AQA? thank you
Thank you for helping me understand this 🙏🙏
Ah so pleased it helped you understand! 😊
Helpful video, Good job.
Glad you think so! Thank you!
tbh u slayed this
thank you!
WoW
Thanks so much
I love your videos
You're so welcome 😁 Glad you like them
what's the difference between the 'cell-surface membrane' and the 'plasma membrane'? or are they the same thing?
Hi, on the aqa specification it says we need to know simple diffusion but in brackets it says (involving the limitations imposed by the nature of the phospholipid bilayer) What is meant by this?
Hello,
This is referring to knowing what types of molecules simply diffuse through the phospholipid bilayer (e.g. only small, lipid-soluble/non-polar molecules). By 'nature' they are referring to the hydrophobic head and hydrophilic tails of the phospholipids.
Hope this helps.
Hey, you know on 01:33 do we have to include the equilibrium part to gain all marks?
Hello, the definition for diffusion is rarely asked at A level, more likely to be a marking point in a longer question or something to discuss within the essay. And in those instances the more detail you give the better, but if you are asked for a definition the main two points would be that it is passive and its the movement of particles from an area of high to low concentration.
Hope that helps :)
I might not fail anymore... Thank UUUU
😄 YES! Keep putting in the hard work and I'm sure you'll ace it.
@@MissEstruchBiology Thank you! I hope so, my exam is tomorrow, but I've been studying for a month!
@@domanidouglas9192 Good luck for tomorrow!
How did it go?
@@adailyfact I got a B :)
How are channel proteins specific to what ion they transport? Thank youu
Its due to the unique 3d shape proteins have, so only certain molecules can fit through.
Hey, just curious. On 07:44, for the solution definitions. Hypertonic is when the water potential of a solution is more negative than the cell, let's say a question pops up asking what a hypertonic solution is. Would I get the mark if I put "A hypertonic solution is when the cell has a higher water potential than the solution". It's the same thing isn't it?
Or like, do I have to use specific terminology on that one?
I wouldn't use 'higher' I'd stick to saying either more or less negative. Pure water had a water potential of 0, so all other water potentials are negative. That's why we say more or less negative.
Hope that helps ☺️
@@MissEstruchBiology Hypertonic is when cells shrivel up so the water potential of the solution is more negative than the cell.
And vice versa for hypotonic?
is this everything we need to know for this topic?
Yeah it is 😊
Is osmosis also till equilibrium is reached
Yes 😊
Thanks!
Nice
From Pakistan
Thank you!