OCR A-Level Biology Module 3: Exchange Surfaces, Transport in Animals and Plants - Complete Guide

[@emilyglonek7417]

sorry to be that person, but there is a mistake at 29:24 - the SAN is located in the wall of the right atrium and similarly the AVN is located at the top of the septum inbetween the ventricles, not in the atria, otherwise this has been a good video so far, thank you!!

[@aeryoakton2651]

can't ever be grateful enough for your videos ! ❤

[@MissEstruchBiology]

you're so welcome!

[@ardchalans]

this video has more than what my teachers have taught me in the 2 years and the video explains all the content so well!! thank you Miss Estruch you are amazing! i wish i had you as a teacher!! forever grateful for your content videos - perfectly follows the specification content

[@kingz5040]

fr learnt the whole thing in an hour. my teachers at school aren't the best at explaining my techer isn't even a bio teacher shes a physics teacher lol

[@Harry_B647]

Word fr if it weren’t for her channel I’d be cooked for the bio exams ngl

[@deenex]

I just needed this right now! Thank you so much

[@MissEstruchBiology]

You're so welcome 😁

[@Mary-lk9ju]

thank you so much for this, it will be incredibly helpful!

[@MissEstruchBiology]

You're so welcome 😁 😊

[@mimi-mo7bu]

thank you soooo much , you’re saving my a levels 🙏🏻

[@MissEstruchBiology]

You're so welcome 😁

[@sprout8426]

thank you so much, this is saving me a lot of time 🥺🥺💚💚

[@MissEstruchBiology]

You're so welcome 😁

[@cxrti_x]

Miss Estruch doing OCR?!!! 🤯

[@MissEstruchBiology]

Yes 😁 Covering entire topics every week. 2 out of 6 complete

[@airbusloverorboeinglover2295]

bronchioles do not contain cartilage

[@UziIsh]

I was about to say the same thing lol

[@hajirahabib4457]

❤😮😊

[@hajirahabib4457]

Some larger bronchioles have cartilage

[@airbusloverorboeinglover2295]

@@hajirahabib4457yes but for ocr a, you will lose a mark if you say they do

[@rayintahersima1835]

In the mark scheme they accept both answers but in book it sais it doesnt have

[@covenantezeh]

26:32 a mistake ventricular diastole relaxes

[@UziIsh]

Not a mistake its more of a mispronunciation 😊

[@aquilastar2592]

THANK YOU!! love your videos to revise :)

[@MissEstruchBiology]

You're so welcome!

[@messyhair487]

Im cooked

[@akarsin]

same

[@georgiegale858]

So helpful, Thank you so much!! :))

[@MissEstruchBiology]

You're so welcome 😁

[@HelloKnow-sb7cm]

Lifesaver!!!!

[@MissEstruchBiology]

😁😁😁

[@klargeworden]

thank you so much for these videos! are you planning on releasing a video about predicted topics for the upcoming ocr papers? x

[@MissEstruchBiology]

Hey so pleased it's helpful! No, I won't be doing predictions as there's no advanced information this year.

[@clairo.9619]

thank you so much!

[@MissEstruchBiology]

You're welcome!

[@charlesmosoeunyane1188]

Hope I enjoy😊😅

[@MissEstruchBiology]

I hope you do too 😊

[@charlesmosoeunyane1188]

Really?:/

[@insanegamer2886]

Hi, on the blood vessel table section for arteries you do not state about the tunica adventitia/externa, tunica media and tunica intima which are the three layers which make up the artery walls. Do we not need to know this as this is what is on savemyexams revision notes for OCR. Thanks!

[@insanegamer2886]

On savemyexams there seems to be a lot more detail compared to the slides in the video. Is this because your slides are more raw & straight to the point?

[@stackinwitdee2]

@@insanegamer2886yep

[@bottykid9522]

Thank you so much for these videos!! Do they cover all the spec content or is it just an overview? Xx

[@MissEstruchBiology]

Covers all the spec content! Not maths or practicals though

[@Charlotte-pd2wl]

@@MissEstruchBiology Will you do a maths video and the practicals preferably if you have limited time, please

[@zizi8539]

could you do a whole ocr syllabus video x i did aqa last year and loved your video

[@MissEstruchBiology]

Hey, entire paper 1/2/3 videos are coming over the next few weeks!

[@philippaboosey3687]

got my mock tomorrow and just realised I know NOTHING about plant transport... hopefully this helps

[@MissEstruchBiology]

Good luck!!

[@user-lh2jr2dv2o]

On the slide at time 5:37 there is a little mistake as the bronchiole do not have cartilage support, other than that it looks like a great video tutorial :)

[@pingooice6760]

Larger bronchioles do contain cartilage whereas the smaller bronchioles do not.

[@Hanzalah8]

At 54:56, wouldnt the water potential increase due to sucrose being actively transported into the sink?

[@urdadpaysmymortgagexox5816]

i think its the water potential in the sink that decreases because sucrose is being actively transported in and that causes water from the sieve element to move into the sink via osmosis. just like how when sucrose was actively transported into the sieve tube element it decreased its water potential

[@marii7215]

Hi, do u cover pressure changes in the cardiac cycle in this video? Thanks a bunch x

[@Rayaann]

Thanks ❤❤

[@sabirsdevv6806]

46:49 water of movement up the xylem lol

[@MissEstruchBiology]

😂

[@mayarokii]

10:43 (don't mind me, just so i can come back to this)

[@MissEstruchBiology]

haha good thinking

[@ellieheheh7519]

Thank you so much!! Sorry to be that person but at 5:19 , i thought bronchioles dont have cartilage?

[@sofiaa1945]

has this included language used in the spec and mark schemes ?

[@ilostmysock_L]

Watching this in 1.75x an hour before my mocks

[@MissEstruchBiology]

😂😂 good luck!!

[@shumaiya4048]

does this also apply for the WJEC exam board

[@MissEstruchBiology]

There are some overlaps, but it's not an exact fit

[@matildaforan7390]

aren't hydrogen carbonate ions HCO3 not HCO?

[@stackinwitdee2]

yep HCO3 - and at 39:26 CO2 + Hg = carboaminohaemoglobin and not haemoglobinic acid and 5% of CO2 is dissolved directly in plasma as CO2 and not haemoglobinic acid

[@stackinwitdee2]

there’s a couple mistakes regarding the haemoglobin related topic,mmHg in the x axis of the dissociation curve stands for millilitres of mercury and concentration of haemoglobin in blood is usually measured in g/dL or g/L. Also haemoglobinic acid (HHb) is formed as a result of Hb acting as a buffer reacting with H+ which is formed from the dissociation of carbonic acid to form HHb preventing changes in pH

[@stackinwitdee2]

other than that and a couple other small mistakes lovely video

[@nithikab]

miss i have mocks in 2 days is it over for me?

[@MissEstruchBiology]

No! Keep trying, there's always time to improve

[@EllieHanmer]

The ocr flash cards you’ve made are they spec specific? Or just overview

[@MissEstruchBiology]

They match the specification exactly

[@pybrandon]

is this for ocr a alevel biology spec?

[@MissEstruchBiology]

yup.😁

[@pybrandon]

thank you! the textbook is so confusing so i just make notes on your videos.@@MissEstruchBiology

[@bismaasghar5788]

❤❤

[@MissEstruchBiology]

Hope you found it helpful 😀