Homeostasis and Genetics: Key Concepts in Biology
This comprehensive guide... Show more
Subjects
Careers
Energy transfers (a2 only)
Infection and response
Homeostasis and response
Responding to change (a2 only)
Cell biology
Biological molecules
Organisation
Substance exchange
The control of gene expression (a2 only)
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
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World war two & the holocaust
Medieval period: 1066 -1509
2m wars and welfare: britain in transition, 1906-1957
1l the quest for political stability: germany, 1871-1991
1f industrialisation and the people: britain, c1783-1885
Britain & the wider world: 1745 -1901
2d religious conflict and the church in england, c1529-c1570
The cold war
1c the tudors: england, 1485-1603
Inter-war germany
2j america: a nation divided, c1845-1877
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
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664
2
Biology Unit 2 (Higher)
3,679
•
23 May 2023
•
ruby
@swzlez
Homeostasis and Genetics: Key Concepts in Biology
This comprehensive guide... Show more
DNA Structure and Function
This page details the structure of DNA, crucial for homeostasis biology higher unit 2 notes GCSE:
Definition: DNA is the molecule that carries genetic instructions for development, functioning, growth, and reproduction of all known organisms.
Highlight: Understanding DNA structure is fundamental to grasping concepts in genetics and inheritance, key topics in WJEC GCSE Biology Unit 2 revision.
Lymphocytes and Immune Response
This page focuses on lymphocytes, a crucial component of the immune system relevant to homeostasis and response notes:
Vocabulary: Antigen - A substance that triggers an immune response, typically foreign proteins on pathogens
Example: When a virus enters the body, lymphocytes produce antibodies specifically designed to bind to that virus's antigens, marking it for destruction.
Phagocytes in Immune Defense
This page explains the role of phagocytes in the immune system, an important topic for homeostasis GCSE exam questions PDF:
Definition: Phagocytosis is the process by which certain cells, called phagocytes, engulf and destroy foreign particles, bacteria, and cell debris.
Highlight: Phagocytes form a crucial part of the body's innate immune system, providing a first line of defense against many pathogens.
Homeostasis: Maintaining Body Balance
This page introduces the concept of homeostasis, central to homeostasis biology higher unit 2 notes:
Definition: Homeostasis is the maintenance of a stable internal environment within an organism, despite changes in external conditions.
Example: When body temperature rises, sweat glands activate to cool the body down, demonstrating a homeostatic response.
Skin Structure and Thermoregulation
This page details skin structure and its role in temperature regulation, important for homeostasis and response notes:
Highlight: The skin's complex structure allows it to play a crucial role in thermoregulation, a key homeostatic process.
Vocabulary: Erector muscles - Small muscles attached to hair follicles that cause hair to stand up in response to cold.
The Nervous System and Reflexes
This page covers the nervous system and reflexes, essential topics in homeostasis biology notes PDF:
Definition: The nervous system is the body's electrical wiring that transmits signals between different parts of the body.
Highlight: Understanding the nervous system is crucial for answering GCSE Biology homeostasis and response exam questions.
Reflex Arc Structure
This page illustrates the structure of a reflex arc, a key concept in homeostasis biology higher unit 2 notes GCSE:
Example: When you touch a hot object, a reflex arc quickly signals your hand to pull away before the conscious part of your brain processes the heat.
Highlight: Reflex arcs allow for rapid, automatic responses to stimuli, bypassing the slower conscious decision-making process.
Pathogens and Body Defenses
This page discusses pathogens and the body's defense mechanisms, relevant to homeostasis and response notes:
Definition: Pathogens are microorganisms that can cause disease.
Highlight: Understanding how pathogens spread and how the body defends against them is crucial for public health and disease prevention.
Types of Microorganisms
This page covers different types of microorganisms, important for homeostasis biology notes PDF:
Vocabulary: Protists - A diverse group of eukaryotic microorganisms, including algae and protozoa.
Highlight: Understanding the structure and types of microorganisms is crucial for studying infectious diseases and immune responses.
Natural Selection and Mutations
This page explains natural selection and mutations, key concepts in natural selection rules and mutations WJEC:
Definition: Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.
Highlight: Understanding natural selection and mutations is crucial for explaining evolution and biodiversity, key topics in variation and evolution WJEC A Level Biology.
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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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
ruby
@swzlez
Homeostasis and Genetics: Key Concepts in Biology
This comprehensive guide covers essential topics in homeostasis biology higher unit 2 notes and genetics, including:
Access to all documents
Improve your grades
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By signing up you accept Terms of Service and Privacy Policy
DNA Structure and Function
This page details the structure of DNA, crucial for homeostasis biology higher unit 2 notes GCSE:
Definition: DNA is the molecule that carries genetic instructions for development, functioning, growth, and reproduction of all known organisms.
Highlight: Understanding DNA structure is fundamental to grasping concepts in genetics and inheritance, key topics in WJEC GCSE Biology Unit 2 revision.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Lymphocytes and Immune Response
This page focuses on lymphocytes, a crucial component of the immune system relevant to homeostasis and response notes:
Vocabulary: Antigen - A substance that triggers an immune response, typically foreign proteins on pathogens
Example: When a virus enters the body, lymphocytes produce antibodies specifically designed to bind to that virus's antigens, marking it for destruction.
Phagocytes in Immune Defense
This page explains the role of phagocytes in the immune system, an important topic for homeostasis GCSE exam questions PDF:
Definition: Phagocytosis is the process by which certain cells, called phagocytes, engulf and destroy foreign particles, bacteria, and cell debris.
Highlight: Phagocytes form a crucial part of the body's innate immune system, providing a first line of defense against many pathogens.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Homeostasis: Maintaining Body Balance
This page introduces the concept of homeostasis, central to homeostasis biology higher unit 2 notes:
Definition: Homeostasis is the maintenance of a stable internal environment within an organism, despite changes in external conditions.
Example: When body temperature rises, sweat glands activate to cool the body down, demonstrating a homeostatic response.
Skin Structure and Thermoregulation
This page details skin structure and its role in temperature regulation, important for homeostasis and response notes:
Highlight: The skin's complex structure allows it to play a crucial role in thermoregulation, a key homeostatic process.
Vocabulary: Erector muscles - Small muscles attached to hair follicles that cause hair to stand up in response to cold.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The Nervous System and Reflexes
This page covers the nervous system and reflexes, essential topics in homeostasis biology notes PDF:
Definition: The nervous system is the body's electrical wiring that transmits signals between different parts of the body.
Highlight: Understanding the nervous system is crucial for answering GCSE Biology homeostasis and response exam questions.
Reflex Arc Structure
This page illustrates the structure of a reflex arc, a key concept in homeostasis biology higher unit 2 notes GCSE:
Example: When you touch a hot object, a reflex arc quickly signals your hand to pull away before the conscious part of your brain processes the heat.
Highlight: Reflex arcs allow for rapid, automatic responses to stimuli, bypassing the slower conscious decision-making process.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Pathogens and Body Defenses
This page discusses pathogens and the body's defense mechanisms, relevant to homeostasis and response notes:
Definition: Pathogens are microorganisms that can cause disease.
Highlight: Understanding how pathogens spread and how the body defends against them is crucial for public health and disease prevention.
Types of Microorganisms
This page covers different types of microorganisms, important for homeostasis biology notes PDF:
Vocabulary: Protists - A diverse group of eukaryotic microorganisms, including algae and protozoa.
Highlight: Understanding the structure and types of microorganisms is crucial for studying infectious diseases and immune responses.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Natural Selection and Mutations
This page explains natural selection and mutations, key concepts in natural selection rules and mutations WJEC:
Definition: Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.
Highlight: Understanding natural selection and mutations is crucial for explaining evolution and biodiversity, key topics in variation and evolution WJEC A Level Biology.
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.
App 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