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Britain & the wider world: 1745 -1901
1l the quest for political stability: germany, 1871-1991
The cold war
Inter-war germany
Medieval period: 1066 -1509
2d religious conflict and the church in england, c1529-c1570
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
2m wars and welfare: britain in transition, 1906-1957
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2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
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Biology
29 Nov 2025
431
1 page
Nadiya Islam @nadiyaaa
Respiration is the vital process that keeps every cell in your body powered up and ready to go.... Show more
Every single cell in your body is constantly working to keep you alive, and respiration is the chemical process that makes this possible. Think of it as your cellular power station that breaks down glucose (sugar) to transfer energy for all your body's functions.
The energy from respiration can't be used directly by your cells, so it's converted into a special substance called ATP. This acts like a rechargeable battery, storing energy for whenever your cells need it for processes like muscle contraction or brain function.
Respiration is controlled by enzymes, which means factors like temperature and pH affect how fast it happens. It's also an exothermic reaction, meaning it releases heat energy to warm your body. Whilst glucose is the main fuel, your body can also break down carbohydrates, proteins, and lipids when needed.
Key Insight Respiration happens in every living cell, all the time - it's literally what keeps you alive!
There are two main types of respiration aerobic (with oxygen) and anaerobic (without oxygen). Aerobic respiration is like having premium fuel - it's incredibly efficient and produces 32 ATP molecules from just one glucose molecule. The equation is glucose + oxygen → carbon dioxide + water.
Anaerobic respiration kicks in when oxygen runs short, like during intense exercise when your heart can't pump oxygen fast enough. It only produces 2 ATP molecules, but it gives you that extra energy burst for short periods. In animals, this creates lactic acid that builds up in muscles, causing that burning sensation and fatigue you feel after sprinting.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore the key concepts of fermentation in both animals and plants, including glycolysis, ATP production, and the conversion of pyruvate to lactate or ethanol. This summary highlights the differences between aerobic respiration and fermentation, detailing the cellular activities that require ATP and the biochemical pathways involved. Ideal for biology students seeking to understand cellular metabolism.
BiologyExplore the complete process of respiration for AQA A-Level Biology, covering glycolysis, the Krebs cycle, and both aerobic and anaerobic pathways. Understand ATP production, fermentation processes, and oxidative phosphorylation with clear diagrams and explanations.
BiologyComprehensive summary of respiration processes including glycolysis, Krebs cycle, and oxidative phosphorylation. Ideal for AQA A Level Biology students preparing for exams. Key concepts include ATP production, NADH, and anaerobic respiration pathways.
BiologyExplore the essential processes of aerobic and anaerobic respiration, including key equations, energy release, and the role of lactic acid. This summary covers cellular respiration, fermentation, and their significance in energy production for living organisms. Ideal for students studying cellular bioenergetics.
BiologyExplore the key concepts of anaerobic respiration, including the process of lactic acid fermentation, energy release, and the implications of oxygen debt. This summary covers essential topics such as glycolysis, the differences between aerobic and anaerobic processes, and the role of lactic acid in muscle fatigue. Ideal for GCSE Biology students.
BiologyExplore the processes of aerobic and anaerobic respiration, including energy transfer, metabolic reactions, and the role of enzymes. This summary covers key concepts such as oxygen debt, lactic acid buildup, and fermentation in yeast, providing essential insights for understanding cellular energetics and metabolism. Ideal for biology revision.
BiologyApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Nadiya Islam
@nadiyaaa
Respiration is the vital process that keeps every cell in your body powered up and ready to go. It's happening right now in your cells, breaking down glucose to release the energy you need for everything from thinking to moving.
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Every single cell in your body is constantly working to keep you alive, and respiration is the chemical process that makes this possible. Think of it as your cellular power station that breaks down glucose (sugar) to transfer energy for all your body's functions.
The energy from respiration can't be used directly by your cells, so it's converted into a special substance called ATP. This acts like a rechargeable battery, storing energy for whenever your cells need it for processes like muscle contraction or brain function.
Respiration is controlled by enzymes, which means factors like temperature and pH affect how fast it happens. It's also an exothermic reaction, meaning it releases heat energy to warm your body. Whilst glucose is the main fuel, your body can also break down carbohydrates, proteins, and lipids when needed.
Key Insight: Respiration happens in every living cell, all the time - it's literally what keeps you alive!
There are two main types of respiration: aerobic (with oxygen) and anaerobic (without oxygen). Aerobic respiration is like having premium fuel - it's incredibly efficient and produces 32 ATP molecules from just one glucose molecule. The equation is: glucose + oxygen → carbon dioxide + water.
Anaerobic respiration kicks in when oxygen runs short, like during intense exercise when your heart can't pump oxygen fast enough. It only produces 2 ATP molecules, but it gives you that extra energy burst for short periods. In animals, this creates lactic acid that builds up in muscles, causing that burning sensation and fatigue you feel after sprinting.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
7
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore the key concepts of fermentation in both animals and plants, including glycolysis, ATP production, and the conversion of pyruvate to lactate or ethanol. This summary highlights the differences between aerobic respiration and fermentation, detailing the cellular activities that require ATP and the biochemical pathways involved. Ideal for biology students seeking to understand cellular metabolism.
BiologyExplore the complete process of respiration for AQA A-Level Biology, covering glycolysis, the Krebs cycle, and both aerobic and anaerobic pathways. Understand ATP production, fermentation processes, and oxidative phosphorylation with clear diagrams and explanations.
BiologyComprehensive summary of respiration processes including glycolysis, Krebs cycle, and oxidative phosphorylation. Ideal for AQA A Level Biology students preparing for exams. Key concepts include ATP production, NADH, and anaerobic respiration pathways.
BiologyExplore the essential processes of aerobic and anaerobic respiration, including key equations, energy release, and the role of lactic acid. This summary covers cellular respiration, fermentation, and their significance in energy production for living organisms. Ideal for students studying cellular bioenergetics.
BiologyExplore the key concepts of anaerobic respiration, including the process of lactic acid fermentation, energy release, and the implications of oxygen debt. This summary covers essential topics such as glycolysis, the differences between aerobic and anaerobic processes, and the role of lactic acid in muscle fatigue. Ideal for GCSE Biology students.
BiologyExplore the processes of aerobic and anaerobic respiration, including energy transfer, metabolic reactions, and the role of enzymes. This summary covers key concepts such as oxygen debt, lactic acid buildup, and fermentation in yeast, providing essential insights for understanding cellular energetics and metabolism. Ideal for biology revision.
BiologyApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Sociology