GCSE Biology - Transport in plants - Translocation (Phloem) and Transpiration (Xylem) #51

Learn how plants transport sugars via the phloem (translocation) and water via the xylem (transpiration) between the roots and leaves. We also cover the factors that affect the rate of transpiration: light intensity, temperature, humidity and air flow.

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has built specifically to make learning and revision as quick and easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you at a glance what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A huge bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

[@user-qg4td6rg5x]

Are your videos for AQA?

[@RevisionR]

@@user-qg4td6rg5x Yes they're mostly AQA I think but also relevant to other exam boards. From their channel info: "Each video has been designed specifically for the 9-1 GCSE courses, and although they most closely mirror the AQA spec, everything you need to know for the main exam boards will be covered."

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i think this might be my favourite ever youtube channel (not for entertainment but for school lmao) but u get the point its amazing!

[@Cognitoedu]

Thank you very much Little Mixer!! we really appreciate it 😊

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Idk bro, this is pretty entertaining...

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Fr

[@Matt-xh7wq]

Post-Video Quiz: 1. What are translocation and transpiration? (0:08) 2. What is the phloem and what are its functions? (0:30) 3. What is the xylem and what are its functions? (1:22) 4. What does lignin do? (1:37) 5. What are the four main factors that affect the rate of transpiration? (2:52)

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thank you for making these questions. Appreciate the effort :)

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cramming in for my biology exam that’s in 2 hours

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Sameee

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Same omg 😭

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this is the first time ive properly understood the effect of air flow and humidity, and my test is tomorrow - thank you so much

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Fr

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[@bigmanjorge]

The four factors affecting the rate of transpiration: Temperature Light Intensity Air Flow Humidity

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Nobody asked

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stop scrolling through comments and get revising bro

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I got a bio gcse n 47 mins

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it so over for me

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I can finally understand leaves, thank you!

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Me too

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Wow thank you so much-not only have you explained it in such a precise and understandable way but I love the artistic style of the video(makes it much more enjoyable)☺️

[@Cognitoedu]

Ah Toni thanks so much, that’s so nice to hear that you’re getting good use out them, and really glad you like the artwork too! 🥳

[@HansTheCool]

Hi guys, I really appreciate this video and thank you for taking your time to create it, but I'm still not sure about the whole water gradient thing, if you are able to explain it, that would be really cool!

[@Cognitoedu]

Hi Hans thanks for the comment! Understanding the water gradient bit will rely on you knowing about ‘osmosis’ - which is the rule that water particles will move from areas of higher concentration to areas of lower concentration. If you haven’t already, give our video on it a quick watch and then rewatch the bit about humidity/airflow. Hopefully the explanations will then make a bit more sense! 👍

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hello! i would like to thank you, because i used your videos as well as freesciencelessons for my end of year exams and got two 9's and a 6. keep up the good work!

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Hey Asian that's amazing mate well done! Hope you've been enjoying your summer?

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[@arlenagcopra6783]

Plants make their own sugars through photosynthesis. Translocation is the movement of materials from leaves to other tissues throughout the plant. And its mainly achieved by flowing the cells which arranged ends to ends to form long columns that called float and tubes. Transpiration involves loss of water vapour through the stomata of plants. All the water molecules is is being arranged into one long chain then every tongue of water evaporates from leaf out of the stomata, drags the rest of the chains up slightly pulling along another water molecule.

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I’ve got my exam on Tuesday for paper one so decided it would be a good idea to know this as it’s a weaker topic for me, just in case of a 6 marker 😫 honestly this account has saved my science so I appreciate it so much especially as my school decided to wait a month before the exam to move me down to combined science higher from triple! Thank you so much :)

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@@_CertifiedHoodClassic WHAT!!! I didn’t see it in the exam 😭 which exam board do you do? Mines AQA!!!!

[@_CertifiedHoodClassic]

@@madeleinej6048 im aqa too. You might remember a sneaky hidden 2 marker about 2 differences between the trans's, but thats about it for this section. Many forgot this and didn't know in my school. I was one of them.

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the sad thing about this is that i probably wont use this in my future but i have to study it just to do good in school lol

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Should you want a career in medicine, then you would need to study biology, and this is a key part of it

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unless you wanna be like a doctor or something which is what your parents probably want

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[@aaryanramani1699]

How do the pores in Phloem help the cell sap to flow. Wouldn't it slow it down instead?

[@machiiu9120]

The pores allow organic nutrients to pass along the sieve tube from one cell to another . Basically more efficency in transport of organic nutrients like cell sap

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Glad it helped! 😊

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Ah thank you so much Mahnoor, we really appreciate it 🤩

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This is a straight dub of a video

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You and freesciencelessons are the goats , thank you honestly , I have my gcse mocks in January and I really want to get 3 9s in science and this really helps, howver i do stuggle a lot with the concept of plant tissue, guard cells stomata all the mesophyll too , if there is a video for this please do recommend , ps i subbed

[@Cognitoedu]

Thank you Barry! Best of luck with your gcses 🤞

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goat inna boat

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[@alecchapman8635]

Could you please explain why it is important that dissolved sugars are moved both upwards and downwards in a plant?

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Night time, a tomato are closed so t can’t take place. At higher temperatures, the (water) particles have more energy. This makes them more likely to evaporate Air flow: the inside of the leaf has a much higher gr

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nobody asked

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thank you ,its actually very good and very understandable ,thanks for this and appreciate your work

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this video improved my understanding so much thank you!

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Hi Luna! Thanks so much for taking the time you let us know - really makes a difference! Good luck :))

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Yes

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very very helpful. thanks so much for your drawings and illustrations!

[@Cognitoedu]

Really happy to hear you found it useful!

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absolutely spiffing!! Much enjoyed. Would definitely recommend to a friend or aquaintance. Rather blew my mind in fact !

[@Cognitoedu]

We're very glad you enjoyed it A!! 🤩

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WE ALL DOING EXAMS AND WE ALL FINNA PASS INSHA ALLAH WADI BOMBO

[@petergoh5628]

Hi, can a transpiration pull occur even if the roots of the plant are not present?

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Really helpful and brief explanation of things!!

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Ah yes I’ve been watching this channels videos for a long time now because they’re really helpful to me and it teaches better than my bio, physics and chemistry teachers lol. I mean seriously, I don’t understand anything in school so I hop onto your channel and watch a video on it :D keep up the explanations!!

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Thank you so much!!! This helped!!! Hats off to you!!!

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such a good video!

[@Cognitoedu]

Hey Binnie, thanks for taking the time to say so! Really lovely for us to hear :)

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Excellent explanation ,I alhumdulilah understood everything

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Nice Explained

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This is such a great video !!!! Thank you 😊!!!

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this video was really useful

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i loveeee the handwriting

[@chedduh_2891]

Correct me if I'm wrong but I was taught that The ph of the soil also affects transpiration rates

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it is good for my students please send a link to download it.

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This helped a lot thanks🤲🏼💯

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Nice video finally my concepts are ckear

[@coronnation8854]

Does more transpiration mean more photosynthesis?

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thanks it helped me alot

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I understand it in a better way. From pakistan

[@GlynisDance]

Excellent explanation of transpiration. :)

[@Cognitoedu]

Thankyou Glynis 😊

[@elijahseto7542]

omg i love this explanation, thank you so much.

[@qzoh5336]

wait.. so whats transpiration again?

[@Cognitoedu]

Hey Soqu, it's a bit of a vague term, but really it just means 'the evaporation of water from leaves' :)

[@urfavlolobaji]

Evaporation of water

[@TEMUshopper]

THANK YOU SO MUCH

[@eemaanlim3971]

Thank you for your effort in explaining these to us.As your title stated is about translocation and transpiration , I would wish to have more information about translocation which related with the phloem loading and phloem unloading stuff. And also I would really like to figure out the usage of sieve cells and companion cells too. Could anyone explain to me by replying my message maybe ?

[@Cognitoedu]

Hi, that's usually more A-level type content so we don't cover it in these videos i'm afraid :(

[@eemaanlim3971]

@@Cognitoedu alright, understood. thanks

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bro stuff like this is what made me drop out

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Best video. Subscribed and shared 😂😂

[@Cognitoedu]

Thanks very much - really glad you found it useful :)

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thank you so much!!! so helpful

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You're welcome!

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legend

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Nice video Cognito

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Good video !!

[@hodaya7594]

hi, thanks for the video, can you please explain to me the air flow on the rate of transpiration and the relatioship between air flow around the plant and transpiration rate? Thanks so much

[@nihaal7750]

Hmmm... so here‘s the deal! To understand the role of airflow in the process of transpiration we ought to first try to understand what air flow really does! A constant airflow just means that the leaf is gonna have fresh air (here fresh indicates unsaturated or less humid air which is yet to be treated by the transpiring water from the plant) gushing over it always, maintaining a good concentrantion gradient, thereby helping water transpire more easily! Hope it helped!

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@@nihaal7750 yes, thank you!

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3:15 slayed

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Thank You!

[@Cognitoedu]

You’re very welcome!