A Level Biology Revision "Neutrophils, Macrophages and Phagocytosis"

You can find all my A Level Biology videos fully indexed at www.freesciencelessons.co.uk/...
In this video, we look at neutrophils, macrophages and phagocytosis. First we explore the different categories of white blood cells. We then look at how neutrophils carry out phagocytosis and the role of opsonins. Then, we explore the role of macrophages as antigen-presenting cells. Finally, we look at cytokines.
Image credits:
Human Skin Structure
commons.wikimedia.org/wiki/Fi...
XenonR, CC BY 3.0 creativecommons.org/licenses/...
Tear
commons.wikimedia.org/wiki/Fi...
NessaLand, CC BY 2.0 creativecommons.org/licenses/..., via Wikimedia Commons
Fresh wound
commons.wikimedia.org/wiki/Fi...
Jpbarrass, Public domain, via Wikimedia Commons
Lining of treachea
commons.wikimedia.org/wiki/Fi...
Magscope, CC BY-SA 4.0 creativecommons.org/licenses/..., via Wikimedia Commons
Inflammation
commons.wikimedia.org/wiki/Fi...
Harrygouvas at English Wikipedia, CC BY-SA 3.0 creativecommons.org/licenses/..., via Wikimedia Commons

Пікірлер: 53

  • @bixstar1469
    @bixstar1469 Жыл бұрын

    Hi sir, I just want to say thank you from the bottom of my heart. Your videos helped me immensely in my revision period. I started properly studying just under 3 months before the exam and my main source of knowledge were your videos. I studied hard and ended up getting good grades (most 7s and 8s in chem, phys and maths). I am now studying in a top london uni and in my 3rd year already. I just wanted to let you know how much of a difference you are making and have made in the past. You were quite literally my main teacher. Thank you for all you have done. Best, Your Student from 2018

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Thanks for your message and your kind words. I'm glad that my videos helped you during your GCSEs and congratulations on your grades. I hope that you are enjoying your time at university.

  • @isthatmatt3384
    @isthatmatt3384 Жыл бұрын

    Excuse me Dr. Sciencelessons, when does your A-Level Biology book drop? We love you

  • @darrenj.griffiths9507
    @darrenj.griffiths9507 Жыл бұрын

    Thank you also for all your amazing work and aid for our science knowledge. They really are very useful and I ever need to know something that I am currently studying etc, I always try to see if you have a video up before anyone else. The way you explain them make even the most complex of things easy to absorb.

  • @foxzy1469
    @foxzy1469 Жыл бұрын

    Loving that fresh trim sir

  • @PreenaParmar-kx1xz
    @PreenaParmar-kx1xz Жыл бұрын

    Thank you so much for continuing to post videos, they have helped me SO much!! I was just wondering if the content in this video was all for AS biology, or some of it is covered in year 2 as well?

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Thanks for the comment. This material is in the AS specs but there might be some elements that reappear in Year 2.

  • @jimmyneutron4505
    @jimmyneutron4505 Жыл бұрын

    the mans back

  • @stwjeongguk3171
    @stwjeongguk3171 Жыл бұрын

    Thank you so much for this video!!

  • @joyliniacoilinia
    @joyliniacoilinia Жыл бұрын

    hi there sir just asking if you would be dropping a level physics videos as i would be taking it near year?

  • @aroushmalik7216
    @aroushmalik7216 Жыл бұрын

    Hi, just wanted to ask if you have videos on a level year 2 content for chemistry and biology

  • @flapsnslats8614
    @flapsnslats8614 Жыл бұрын

    the Goat of gcses

  • @hxmdnv
    @hxmdnv Жыл бұрын

    Hii Sir, I hope you are well. I was just wondering how long it will take you to finish both a level biology and a level chemistry courses

  • @metaazulf7479
    @metaazulf7479 Жыл бұрын

    Hi firstly can I just thank you so much for all these videos they are truly so useful and you have helped millions of students achieve their dreams. Im currently studying gcse triple science but at A level I will be taking eduqas biology and chemistry, do you know how similar eduqas is to the other more common exam boards? Thank you again :)

  • @dougclinton2014
    @dougclinton2014 Жыл бұрын

    My son used your lessons for his gcse physics and chemistry and found them tremendously helpful. He's now doing A-Level Physics. I know you don't make lesson videos for this, but I was hoping you might have a recommendation for other videos that cover Physics that he could use? There are a huge number of resources, but it's very hard to know which ones are really good.

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Hi and thanks for the comment. Physics Online is highly rated for A level Physics videos so I would recommend those.

  • @dougclinton2014

    @dougclinton2014

    Жыл бұрын

    @@Freesciencelessons Thanks for the recommendation! I'll pass that on to him.

  • @karlfernandes1367

    @karlfernandes1367

    Жыл бұрын

    @@dougclinton2014 also Zphysics if he is using OCR A

  • @communistkorok1501
    @communistkorok1501 Жыл бұрын

    Love your content

  • @HamzaFrench1
    @HamzaFrench1 Жыл бұрын

    Thanks that really helped me

  • @amusedsquid4295
    @amusedsquid4295 Жыл бұрын

    Thank you for your work sir

  • @khurram2637
    @khurram2637 Жыл бұрын

    sir thank you for making such videos your videos have helped me alot also i hae a request can u please make video on a chapter electrochemistry of As level as its very difficult and i cant find any other channel which explains so good like yours

  • @JoyOkechukwu-fl4rp
    @JoyOkechukwu-fl4rp Жыл бұрын

    Thanks a bunch sir🙏

  • @kalgae
    @kalgae Жыл бұрын

    Thank you 😊

  • @asbmaverick17
    @asbmaverick17 Жыл бұрын

    Hi, will you cover A level Physics by any chance? Thanks

  • @epticsstuff3612
    @epticsstuff3612 Жыл бұрын

    I'm so glad I moved to set 1

  • @ekohprecious2903
    @ekohprecious2903 Жыл бұрын

    Thank you sir🎉

  • @jackgamz4512
    @jackgamz4512 Жыл бұрын

    please do some a level physics videos

  • @jouad5611
    @jouad5611 Жыл бұрын

    @freesciencelessons, In your GCSE Biology "stem cells" video, you explain how a bone marrow transplant is done. But it doesn't mention this on the AQA spec or any other resources. May I ask why you included it?

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    It's on page 21 of the AQA Biology spec. "Treatment with stem cells may be able to help conditions such as diabetes and paralysis". Also, I have updated the thumbnails as I had a couple of queries on whether my videos are still appropriate for the 2023 exams, which they are as the spec has not changed.

  • @jouad5611

    @jouad5611

    Жыл бұрын

    @@Freesciencelessons Yeah I saw that on the spec, but it doesn't specifically mention bone marrow transplants and how it's done. I apologise if I'm being a little stubborn, but it's just so I don't waste time learning things I don't need. So, do we need to know about bone transplants like you taught it in the video or no?

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Yes, I only put things in the videos that you need to know.

  • @jouad5611

    @jouad5611

    Жыл бұрын

    @@Freesciencelessons So we have to know how a bone marrow transplant is done as you explained in the video?

  • @akh684
    @akh684 Жыл бұрын

    Afternoon sir. How do I retain information about Required practicals? Because that’s probably what I struggle with the most when it comes to learning the content. Is there any advice or tips you could give me in order for me to be able to remember how to do certain practicals?

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Try to reduce them to the smallest number of steps (what you are changing - IV, what you are measuring for each change - DV and what you are keeping constant - CV). Include key apparatus for each of those and make sure that you state them in the correct order (ie what you change has to happen before what you measure for each change). Write them on flashcards and repeat them until you know them.

  • @akh684

    @akh684

    Жыл бұрын

    Thanks for the advice sir.

  • @fungusz_4292

    @fungusz_4292

    Жыл бұрын

    go and do the practicals

  • @its_hayes___
    @its_hayes___ Жыл бұрын

    Hello sir, I just wanted to ask are you done with this playlist? (Immune system)? Thanks :)

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Hi. I still have a few more videos to add. I'll be uploading more this week.

  • @its_hayes___

    @its_hayes___

    Жыл бұрын

    @@Freesciencelessons Thank you sir! Just wondering, do you have videos on Osmoregulation (a level) and the Endocrine system (a level)?

  • @Peter-wv1dx
    @Peter-wv1dx Жыл бұрын

    Sean I love you so much

  • @Az.podcast
    @Az.podcast Жыл бұрын

    Please can you do Physics A level

  • @kimchichi2125
    @kimchichi2125 Жыл бұрын

    Here’s come my saviour

  • @fizz6002
    @fizz6002 Жыл бұрын

    hello sir, i'm going to the buy chemistry paper 1 but i don't know which one is the best i'm trying to do higher paper let me know which one is the best for your 9-1 chemistry paper 1 please reply ASAP. btw i find your videos really helpful.

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    Hi. If you are doing Triple Science then you need the Triple Chemistry 1 book. If you are doing Combined Science, then you need the Combined Science Chemistry 1 book.

  • @fizz6002

    @fizz6002

    Жыл бұрын

    @@Freesciencelessons ok thank you so much

  • @rastamanjon345
    @rastamanjon345 Жыл бұрын

    first to the goat

  • @roshankarms462
    @roshankarms462 Жыл бұрын

    Hi sir on your past videos I says for 2023 exams, what does that mean as It have gcses this year?

  • @Freesciencelessons

    @Freesciencelessons

    Жыл бұрын

    It means that all of the GCSE videos are appropriate for this year's GCSE exams (2023).

  • @roshankarms462

    @roshankarms462

    Жыл бұрын

    @@Freesciencelessons Thank you sir!

  • @LorryClub
    @LorryClub Жыл бұрын

    W

  • @mustafaahmed4371
    @mustafaahmed4371 Жыл бұрын

    noti