Haemoglobin & Oxygen Dissociation Curves

Подписаться 36 тыс.

Просмотров 96 тыс.

50% 1

In this video, we look at the structure of haemoglobin and its role as a respiratory pigment. We then take a closer look at oxygen dissociation curves and how they change depending on conditions such as oxygen concentration and rate of respiration.
Made for AQA AS Biology students studying Unit 2.

Опубликовано:

16 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 99

@DrQuackles 7 лет назад

Always think of the LLL rule: Curve to the Left = Loading/Association @ Low PP O2

@tabarnakdecalisse 4 года назад

also llama

@sarafdiez 7 лет назад

thank you so much, this is the only thing that got me to finally understand the concept! congratulations on your great videos!

@ryanc-9854 9 лет назад

Excellent quality video! Particularly liked the exam question at the end!

@Minasiu 8 лет назад

Please make more AS videos! More on biodiversity? :)

@anisha4667 6 лет назад

3 years on, and still useful! Thank you soooo much

@sezybabe100 5 лет назад

Been through so many videos this is he first one that made sense! thankyou so much!

@racheljane5701 7 лет назад

This is such an amazing resources and the question at the end is particularly useful. Thank you!

@andycole5487 8 лет назад

absolute beast of a teacher, ur doing 2 much for students, i highly appreaciate it, can you please go through the paper 2 of the specimen please, and can you also do a video on how to answer application/graph questions, thank you so much .

@xBabylon4Gamers 7 лет назад

Without a doubt one of the best Tutorials so Far

@Mwah5800 9 лет назад

Been looking for this video for such a long time, it wasn't here when I last checked... THANK YOU

@MrPollockBiology 9 лет назад

Jem S Not a problem!

@EmmaJade2k10 7 лет назад

Im so glad I've found your channel, just in time for my exams next month. Thanks! Also its nice to see hear somebody British teaching Biology, as there are a lot of American videos on RU-vid and they pronounce a lot of things differently.

@aurellyrose7850 5 лет назад

You seriously r the best!! Thanks so much for the clear explaination sir

@rakib567 9 лет назад

best youtube site for biology revision! fantastic work.... if you could do a video on more of the wish woshy application questions (which require more educated guessing than actual knowledge) that would be great... :D

@MrPollockBiology 9 лет назад

Rakib sdq May try and do an exam paper walkthrough for a recent one if I get chance. Sometimes with AQA it's best-guess...application questions you need to know your how science works stuff...controls/variables/reliability etc, and be able to interpret graphs. If in doubt, use key words like osmosis etc a lot! And talk about as much detail as possible with graphs!

@rakib567 9 лет назад

Mr Pollock awesome! i would recommend you go through the june 2014 unit 2 since it had a whole load of application questions and massive graphs! anyway i can't thank you enough these videos are awesome. great for quick revision!

@TammyAbrahams 9 лет назад

very good! taken me 2 years to finally understand this!

@mcol33 9 лет назад

This video has been so useful(and so are ALL your other videos)!!!! Thankyou SO much 😄

@MrPollockBiology 9 лет назад

M Col Glad I could help! Best of luck for your exam!

@hamzaahmadshaikh7648 6 лет назад

5:40 Mate that llama scared the living tar out of me! Very helpful vid, though.

@MrPollockBiology 6 лет назад

Sorry for the scare! Glad you found it useful!

@Adam-md6nh 8 лет назад

this is so so useful, absolutely fantastic video!!

@momna6318 8 лет назад

Thankyou so much, I am forever grateful 👍

@eniolanduka2303 6 лет назад

Excellent video. Clear and concise

@cookingmadesimple8678 5 лет назад

AMAZING SIR, I CANNOT THANK YOU ENOUGH FOR THIS FANTASTIC VIDEO WHICH MADE IT 100000X EASIER TO UNDERSTAND. I REALLY REALLY WISH YOU WERE MY A LEVEL BIOLOGY TEACHER MR POLLOCK!!!!

@SunilPatel 7 лет назад

Exam this week - great explanation thanks!!

@shawnloong123 7 лет назад

Good job man. Really appreciate it

@i_am_gods_child 3 года назад

brilliant video, thanks so much! these are really gonna be useful during online learning

@ievarisevaite5476 8 лет назад

Finally understood it!! Thank you!!

@Fotograf110 4 года назад

Very nicely explained, thank you!

@PaulSt-Germain-c7u 6 лет назад

Great video with great explanation.

@mcrrocks897 7 лет назад

Very helpful, especially with the example question and summary at the end

@dharma_donk170 7 лет назад

Very succinctly explained, thank you

@supersayinli2996 9 лет назад

amazing video for revision . Got the exam on the 1st of june and with these vids its so helpful,keep up with the good work!

@MrPollockBiology 9 лет назад

Supersayin li Good luck for Monday!

@paigelewington1475 8 лет назад

Thank you so much, finally understand

@bethtremain3409 5 лет назад

The most useful video I've found

@asherjalabert9725 6 лет назад

Always help me to understand these things! Thanks

@MrPollockBiology 6 лет назад

I'm glad you continue to find my videos useful!

@harrylol4 9 лет назад

Really good video thanks or the help

@Androidstuffify 9 лет назад

Thanks for all your videos, very helpful. Aqa mark scheme is very specific, any tips on how to gain all the marks specially on high mark questions

@Annas-uk9vq 8 лет назад

these videos are very useful, could you go through questions like you have with this one, with future videos

@vs5711 9 лет назад

Could you possibly do videos on index of diversity and circulation (double and single) and vessels and tissue formation.

@ritahalls5600 6 лет назад

Thanks This was so helpful

@leilathomas2221 8 лет назад

Thanks so much for this video! I finally understand the dissociation curves. If I remembered: Left-shifted curve = haemoglobin readily Loads oxygen Right-shifted curve = haemoglobin readily Removes oxygen Would this be correct for any dissociation curve shift? I understand that oxygen is "unloaded" and not removed, it's just for remembering sake. Thanks!

@mazfed3855 6 лет назад

THANKS SO MUCH

@dovegreen4733 6 лет назад

👍

@gunmanshotman8271 6 лет назад

Thank you

@meriembouslim7837 6 лет назад

Life saver

@annabellewilliams3992 9 лет назад

When you're talking about the Bohr effect should it say it unloads more readily at lower partial pressures of oxygen rather than high i.e the muscles so you get more oxygen to respiring tissues for aerobic respiration? Just checking because I'm confused :)

@MrPollockBiology 9 лет назад

Nope, it unloads more readily at a higher ppO2...so it starts unloading sooner so that your respiring tissues don't run out of oxygen. Hope that helps!

@i_am_gods_child 3 года назад

@@MrPollockBiology this is 5 years later but wow that one comment made it all make sense! also thankyou for the video!!

@bryanhui9284 8 лет назад

u save my life

@cutericepanda 8 лет назад

Thank you so much

@MrPollockBiology 8 лет назад

+EXO K&M No probs!

@emilyhughes921 6 лет назад

Just wanted to ask about the summary: does hb unload in high ppO2 and and load in low ppO2 OR load in high ppO2 and unload in low ppO2?

@devonturnerpat1733 8 лет назад

Do you have any videos on Antibiotics and Bacteria? I'm retaking unit 2 last year and struggling on that topic :(

@NomanKhan-bd4st 5 лет назад

Thanks

@havingfun4897 5 лет назад

Fetal haemoglobin has a higher affinity for O2 than adult haemoglobin. This enables the transfer of oxygen to the fetus during development as oxygen dissociates from haemoglobin in the mother’s blood in favor of haemoglobin in the fetus’ blood

@faysummers3913 5 лет назад

So would you say the haemoglobin has a lower affinity for oxygen when the partial pressure of CO2 is higher?

@rakimrs648 9 лет назад

Hi sir, could you do a Carbon dioxide curve one please?

@virdahdar6324 8 лет назад

ilysm

@bradleybussing7767 8 лет назад

fantastic

@MrPollockBiology 8 лет назад

+Bradley Bussing Cheers!

@missmuslimmah9500 7 лет назад

doesn't haemoglobin unload more readily at lower ppO2?

@OneShadowHeart 9 лет назад

Great video, can you explain what would happen to the Feotal Haemoglobin. Is there an acronym or phrase you use to remember the pp in relation to affinity and loading/unloading because I find it extremely hard to remember

@MrPollockBiology 9 лет назад

Shift to Left = Loads readily at Low Shift to Right = Unloads readily at High Left,load,low

@ELFsuju1000 8 лет назад

During exercise, the curve will shift to the right and the partial pressure of the tissue increased. why there is an increase in the partial pressure of oxygen in tissue ?

@salmaelsawy9632 5 лет назад

Does at low oxygen concentration haemoglobin has higher affinity to oxygen??

@hayamelshazly529 8 лет назад

thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanks ^_^

@MrPollockBiology 8 лет назад

+hayam elshazly You're weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelcome

@BMXeditsWTP12 8 лет назад

I love you

@One_For_All_Stories 5 лет назад

Thank you for the video but in summary, there is a mistake, it is loads at low partial pressure of O2 and unloads at high p.p of O2, in the summary it is the opposite

@lucyjo2331 8 лет назад

Exam in 50 mins and I finally understand this, thanks :)

@logande99 8 лет назад

This will probably be in Paper 2 on Tuesday (I kinda hope)

@lucyjo2331 8 лет назад

Yess I hope so because its something id actually get marks for :')

@harishussain4267 8 лет назад

I hope so!

@harishussain4267 8 лет назад

That series dilution question on paper 1 was horrible... I DID NOT UNDERSTAND IT... Probably because it's one of the only things I didn't look over lmao

@logande99 8 лет назад

Yeah I mean the good thing about this topic is that most of the questions will be similar and the answer is nearly always the same.

@MegaShiney99 7 лет назад

Really good, shame i'm on OCR...

@suhail1200 7 лет назад

Believe me stick to OCR haha.Aqa is a nightmare some wierd questions with stupid answers and sometimes the paper has 30% bio and the rest is basically English language.