MASS TRANSPORT IN ANIMALS - AQA A LEVEL BIOLOGY + EXAM QUESTION RUN THROUGH

In this video, I explain ALL of the content required for the "Mass Transport in Animals" section for AQA A Level Biology.


This includes: haemoglobin, circulatory system, the heart, cardiac cycle (volume + pressure changes), adaptations of different blood vessels (arteries, arterioles, veins and capillaries) and the formation + return of tissue fluid. Time stamps are in the comments section.


The content in this video crosses over with other exam boards too.
I also go through a few exam questions and their mark schemes.

~Please leave a comment if you have any questions~

Images taken from:
Quizlet

[AlevelBiologyHelp]

00:28= Haemoglobin, oxyhaemoglobin dissociation curve and the Bohr effect
08:09 = Circulatory system of mammals
10:28= Gross structure of the human heart
13:44 = Cardiac cycle (volume and pressure changes)
17:20 = Adaptations of blood vessels - arteries, arterioles, veins and capillaries
20:57= Formation and return of tissue fluid
23:20= Exam questions and mark schemes

[shahidmiah]

You can remember the valves with LABRAT - Left atrium bicuspid & right atrium tricuspid. Hope this helps!

[annamaguire]

This person is single handedly saving my a levels

[imogennnnn]

I've never understood tissue fluid, like what is is, how it was formed, etc, but seeing your explanation, pausing the video to answer the exam questions and then actually getting some marks for it is amazing! Thank you so much ❤️

[MayaMaya-wdtw]

I have my Biology Y12 mock soon on the AS content and its hard with missing so much school this year due to Covid but ur videos have helped me get through all the content in time and revise them too, thanks soooo much, your time and effort put behind all these videos means so much to all us students out here. If we do well in our exams your deserve all the appreciation.
THANKYOU so much again, your such a hero 😊

[darcywinrow]

This is an amazing video thanks! To remember bicuspid and tricuspid valves, I’ve always thought that tRIcuspid has ri in it as in RIght, so that must be on the right side of the heart! Again thanks for the video, I found it extremely helpful for my exams :)

[lucyr]

I have my mocks next week, this video really helped, thank you so much!!:)

[munig]

hi, this was such a good video! could you pls do a vid where you go through questions on the bohr effect and dissociation curve?

[gewty]

at 12:12 I think your fine with saying atrioventricular valve for both as my teacher says its fine and i have put that down for my topic tests and other assessments and still get the mark however i also think learning them can be kind of helpful too

[kylajaynecamilosa]

the whole of this chapter was a complete blur to me but this video really helped me break it down into simpler sections on my flashcards so thank you! i'm slightly more confident now if this were to appear in my final a level exams coming up this may/june!

[abi.anderson]

Do you have a video on cardiovascular problems like atheromas etc? Thanks!

[jackwileman]

merci cela m'a aidé à commencer à apprendre l'anglais et j'aime le chocolat

[jameschristopher]

Remarkable vid I applaud you for your efforts. Appreciate this as ill be sitting a test in an the or 2.

[FrozenPrimordial]

Hey I wanted to ask are your videos ACCURATE and mark scheme SPECIFIC? I see lots of biology AQA A-Level videos with mistakes and content that goes off tangent. thanks

[Oscar-jtrq]

to remember the valves in the heart just think try before you buy

[ikramali]

I really appreciate your work thankyou so much

[vsn_aks]

The drawing of the Bohr shift curve was 𝘌𝘟𝘊𝘌𝘓𝘓𝘌𝘕𝘛. I'm definitely not going to forget 😂

[vishnumistry]

Don't we also need to know about heart problems, because i recall doing an exam question and my teachers talking about the problems of a baby being born with a hole in its heart. Or is it something that isn't compulsory to know but instead that we have to adapt our current understanding of the heart in order to answer that question?

[fahmidahahmed]

Love your videos thanks for helping out!

[maisamraza]

Is there a formula for % saturation of Hb with O2? And if so, do I need to remember it for the spec?