Miss BioRach you are so incredible... cannot emphasise how lucky I feel to have found your channel because you explain things so well! I never thought I would be able to understand A level biology, but you explain it so well, better than any textbook or teacher! As a Year 13 student I seriously want to say thank you!
@BioRach3 жыл бұрын
Thank you, your words really mean a lot! :D all the best to you and I'm sure your hard work will pay off in these two crazy years!
@kazishahjalal68522 жыл бұрын
Yeah agreed with you. Miss BioRach you are one of the best biology teachers out there.
@Diorfitzz4 ай бұрын
@@kazishahjalal6852no she isn’t
@ioanacret44293 жыл бұрын
This 25 min video is so informative and I actually understand the whole response! You are gonna save my alevels!!!
@BioRach3 жыл бұрын
🤗🤗🤗
@hollyc60253 жыл бұрын
this is SO HELPFUL, I'm binging all these videos before my test on communicable diseases tomorrow
@Sheena1234ization4 жыл бұрын
I think Year 2 videos like Photosynthesis and Respiration would help as they're the units we didn't finish in class
@BioRach4 жыл бұрын
Check out the playlists here! :) Photosynthesis: kzbin.info/aero/PLcqmJII16GiD3LnjfHWNXcmw7vNlNtWtg Respiration: kzbin.info/aero/PLcqmJII16GiA3XA6ZI0c7dFCwcnMJql7W Enjoy!
@ellag9877 Жыл бұрын
Thank you so, so much, you are brilliant! I have my paper 2 this Friday and you are absolutely saving me!!!
@sullym9383 Жыл бұрын
Long day
@deuterium4.02811 ай бұрын
you're genuinely one of the best teachers ive ever come across! thanks
@kndy61462 жыл бұрын
May God bless you abundantly wherever you go and May your relationship with God be strengthened! You are an Amazing Teacher, You explain concepts in such a detailed way yet so concise I pray you become more recognised THANK YOU!
@JaiV772 жыл бұрын
I have my paper 3 on Friday, thanks so much :)
@sujata89574 жыл бұрын
Very concise and useful!!!Thank you
@BioRach4 жыл бұрын
Glad it helped! Thanks for watching :)
@creesrees62353 жыл бұрын
amazing. will b forever greatful, youre actually helping students shape their future.
@BioRach3 жыл бұрын
Glad you find it helpful, thanks for watching! :D
@jamiealexander32372 жыл бұрын
This definitely shouldn't be free. This and all your videos are so much better than anything that out there.
@crumble12514 жыл бұрын
Thanks so much, this was a brilliant video!
@ellakitcat5653 Жыл бұрын
YOU’RE AMAZING
@OO-wr5hz3 жыл бұрын
I rrwatched this video 8 times already its so useful
@user762963 жыл бұрын
dm me if you want ocr bio notes
@natashajoyy42233 жыл бұрын
Very Clear and Helpful, fast overview!
@munaaliii3 жыл бұрын
great video.. thank you for your efforts, miss!
@kalumthomson56384 жыл бұрын
Minor point: You're correct in that Th cells do divide by mitosis (clonal selection), however they differentiate into Th1, Th2 (Tmemory), Treg, Tfh and Th17 cells, not Tc cells. Cytotoxic T cells are formed in the thymus and exist as a seperate class of T cell, they are not "created" by the clonal selection and differentiation of Th cells - the Th cell is activated to differentiate into the effector Th cells mentioned above. Apologies if the spec says otherwise and feel free to ignore me if this is the case, but it is an oversimplification. There is also recent evidence of neutrophils gaining APC ability in certain circumstances which is really interesting.
@BioRach4 жыл бұрын
I'm sure you're right, tho sounds like they're of a degree-level understanding! You're right that it's oversimplification, though I am following the spec and try to make sure my viewers are able to get a good understanding of the content that they need to know for exams. Thanks for sharing though :)
@kalumthomson56384 жыл бұрын
@@BioRach No worries, I thought that might be the case but I thought it'd be of interest anyway as immunology is a really interesting topic! :)
@BioRach4 жыл бұрын
Agreed! :D
@munaaliii3 жыл бұрын
@@kalumthomson5638 thank this an important comment for us, students, as well, to let us know that there is more to this. Thanks for your informativity.
@harismohammad20053 жыл бұрын
@@munaaliii There is always more, why would you think there is less? :)
@munaaliii3 жыл бұрын
But miss can you clarify the link between the first T(h) and the B(APC) its like an antibody joined with an APC.. i don’t understand that
@sicelyfrancis68952 жыл бұрын
You are so incredibly helpful! I was just wondering if you knew anywhere good to get question for recall that are more simple, not like exam style?
@BioRach2 жыл бұрын
Check out Oxford Revise! They have lots of retrieval questions :D and retrieval is key to success...! kzbin.info/www/bejne/d5PQqZaupr6kr7M You can also get more in this Excel sheet: docs.google.com/spreadsheets/d/1pyEacyxFBZAJGPztZBAw5SSmUG8ZYQ0Q/edit?usp=drivesdk&ouid=102546770558231031044&rtpof=true&sd=true
@carmenr61353 жыл бұрын
super helpful overview! thanks
@sarawananselvakumar5333 ай бұрын
Thank You
@kevinpolpitiya32003 жыл бұрын
Great video!! Thankyou!!
@Rayaann3 ай бұрын
Ty rach
@hollywyett59534 ай бұрын
such a great video!! thanks so much
@teeshajairam57412 жыл бұрын
Helped a lot thankyouuu❤️
@yusufkarimboy62803 жыл бұрын
i swear you are acc the best!
@moclepip55902 жыл бұрын
brilliant absolutely so useful you queen
@juneooo21014 жыл бұрын
I'm in year 6 idk what's this but i love sciences
@BioRach4 жыл бұрын
Haha don't worry, you'll learn them in the future! :D
@harismohammad20053 жыл бұрын
if you love science you should purchase and read the Horrible science books as they contain a surprising quantity of advanced information explained briefly and in a entertaining way. In addition you could watch episodes of the Magic School Bus for the same reason. Also Sci Show on KZbin is a brilliant way to gain some scientific knowledge in a brilliantly explained way. I hope this helps
@Bostan982 ай бұрын
aww this is so cute 🥲
@Account-ql3mc Жыл бұрын
This vid is SO good!!!
@CJwslos4 жыл бұрын
thank you!
@R200392 жыл бұрын
THANK YOU SO MUCH!!!!!
@yillokimo33533 жыл бұрын
really nice video! Just one question, do t helper cells also undergo clonal selection?
@mowingthegrass1232 жыл бұрын
omg this is gorg tysm
@khaled-ig1hz3 жыл бұрын
does that mean Th cells are stem cells which divide by mitosis to form specialised cells Tm ,Tk, and Tr cells in the thymus ?
@9464dhhudheub2 жыл бұрын
Thanks so much
@overprime39783 жыл бұрын
Very good video, thanks
@fizaahmed44643 жыл бұрын
Can you do a video on cell structure please
@manasigrandhi4154 Жыл бұрын
Thank you soo much this really helped! I have a question. When the interleukins trigger the Th cells to increase in number to produce other types of T cells (such as t-killer, t-memory and t-regulatory) do they undergo clonal selection and expansion as well?
@ilangoodfriend31382 ай бұрын
no
@imadhussain38123 жыл бұрын
Hi why is there only 12.5 and 12.6 and not the other subchapters
@nikhillal70483 жыл бұрын
Wonderful.
@digitella-4304 Жыл бұрын
Great video !! just a little question.. are T regulatory cells and T helper cells the same or different ? I do AQA A level biology so Im not really familiar with the regulatory term in immunity 😅
@BioRach Жыл бұрын
The two cells are different. T helper cells help signal other cells to increase the immune response. T regulatory cells decrease the response - it basically kills the other immune cells except for memory cells, once the pathogens are killed at the end of an immune response. Having said that, I think you don't need to know about regulatory cells for AQA - double check the specification to be sure! Thanks for watching! :)
@digitella-4304 Жыл бұрын
@@BioRach thats interesting to know ! thanks so much :D
@willotoole4475 Жыл бұрын
Can B and T cells undergo clonal expansion or is it just B cells?
@BioRach Жыл бұрын
Both B and T cells can do this but the phrase is mostly used for describing B cells.
@Sanchoo253 жыл бұрын
Thanks for the video .... but do macrophages have round shaped nucleus or bean shaped one , am confused now
@BioRach3 жыл бұрын
Macrophages have a round nucleus. They stay in the bloodstream. Neutrophils are the ones with a multi-lobed nucleus, which allow them to leave the bloodstream to infected areas for phagocytosis. You can watch my video on phagocytosis for more details! :)
@Sanchoo253 жыл бұрын
@@BioRach thanks a lot
@shaziekhan6394 жыл бұрын
Have you made 12.1,12.2,12.3 and 12.7?
@BioRach4 жыл бұрын
No I haven't since they're mostly facts you just need to learn rather than understand, so I've not put them on my priority list as of yet :)
@maxgibbingsyear11273 ай бұрын
16:36
@littlemastergaming56153 жыл бұрын
why don't u do aQA THE Content is similar but still plz do aaa