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7 Dec 2025

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Understanding Lipids and Their Role in Health

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ethan

@ethanedwards

Lipids are essential biological molecules that play crucial roles in... Show more

# LIPIDS

2 types of organic chemicals

1. Glycerol

H
H-C-OH
H-C-OH
H-C-OH
H

2. Fatty Acids
{
Saturated
unsatured

Saturated
Fatty Acids

Understanding Lipids: The Basics

Ever wondered why butter is solid but olive oil is liquid at room temperature? It's all about lipids and their molecular structure. Lipids are made up of two main components: glycerol athreecarbonbackbonea three-carbon backbone and fatty acids (long hydrocarbon chains).

The key difference lies in whether the fatty acids are saturated or unsaturated. Saturated fatty acids have no double bonds C=CC=C in their hydrocarbon chains, meaning they're packed with the maximum number of hydrogen atoms. This creates straight chains that pack tightly together, forming stronger intermolecular forces.

Unsaturated fatty acids contain at least one double bond, creating a "kink" in the chain. These kinked chains can't pack as closely together, resulting in weaker intermolecular forces. This structural difference explains why saturated fats (found mainly in animals) are solid at room temperature, whilst unsaturated fats (found in plants) remain liquid.

Quick Tip: Remember that lipids are non-polar molecules, which means they don't dissolve in water but will dissolve in organic solvents like alcohol.

# LIPIDS

2 types of organic chemicals

1. Glycerol

H
H-C-OH
H-C-OH
H-C-OH
H

2. Fatty Acids
{
Saturated
unsatured

Saturated
Fatty Acids

Lipids and Health: Why It Matters

Your diet's fat content directly impacts your cardiovascular health in fascinating ways. Saturated fatty acids increase LDL cholesterol (the "bad" kind), which forms fatty deposits called atheroma in your blood vessels. When these deposits build up, they cause atherosclerosis - essentially clogged arteries that restrict blood flow to your heart, potentially leading to heart attacks.

On the flip side, unsaturated fatty acids boost HDL cholesterol (the "good" kind) that actually carries cholesterol to your liver for destruction, reducing cardiovascular disease risk. This is why nutritionists recommend plant-based oils over animal fats.

Lipids serve multiple vital functions in your body. Triglycerides act as energy storage powerhouses because they contain more C-H bonds than carbohydrates, plus they provide thermal insulation and protect delicate organs like your kidneys. Phospholipids form biological membranes and create the myelin sheath around nerve cells for electrical insulation.

Did You Know? Triglycerides produce metabolic water when oxidised - this is water your body creates during chemical reactions, which is particularly important for desert animals!



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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 😍😁😲🤑💗✨🎀😮

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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

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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

 

Biology

90

7 Dec 2025

2 pages

Understanding Lipids and Their Role in Health

user profile picture

ethan

@ethanedwards

Lipids are essential biological molecules that play crucial roles in your body, from storing energy to protecting your organs. Understanding the difference between saturated and unsaturated fats will help you make sense of nutrition labels and why certain foods affect... Show more

# LIPIDS

2 types of organic chemicals

1. Glycerol

H
H-C-OH
H-C-OH
H-C-OH
H

2. Fatty Acids
{
Saturated
unsatured

Saturated
Fatty Acids

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Understanding Lipids: The Basics

Ever wondered why butter is solid but olive oil is liquid at room temperature? It's all about lipids and their molecular structure. Lipids are made up of two main components: glycerol athreecarbonbackbonea three-carbon backbone and fatty acids (long hydrocarbon chains).

The key difference lies in whether the fatty acids are saturated or unsaturated. Saturated fatty acids have no double bonds C=CC=C in their hydrocarbon chains, meaning they're packed with the maximum number of hydrogen atoms. This creates straight chains that pack tightly together, forming stronger intermolecular forces.

Unsaturated fatty acids contain at least one double bond, creating a "kink" in the chain. These kinked chains can't pack as closely together, resulting in weaker intermolecular forces. This structural difference explains why saturated fats (found mainly in animals) are solid at room temperature, whilst unsaturated fats (found in plants) remain liquid.

Quick Tip: Remember that lipids are non-polar molecules, which means they don't dissolve in water but will dissolve in organic solvents like alcohol.

# LIPIDS

2 types of organic chemicals

1. Glycerol

H
H-C-OH
H-C-OH
H-C-OH
H

2. Fatty Acids
{
Saturated
unsatured

Saturated
Fatty Acids

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Lipids and Health: Why It Matters

Your diet's fat content directly impacts your cardiovascular health in fascinating ways. Saturated fatty acids increase LDL cholesterol (the "bad" kind), which forms fatty deposits called atheroma in your blood vessels. When these deposits build up, they cause atherosclerosis - essentially clogged arteries that restrict blood flow to your heart, potentially leading to heart attacks.

On the flip side, unsaturated fatty acids boost HDL cholesterol (the "good" kind) that actually carries cholesterol to your liver for destruction, reducing cardiovascular disease risk. This is why nutritionists recommend plant-based oils over animal fats.

Lipids serve multiple vital functions in your body. Triglycerides act as energy storage powerhouses because they contain more C-H bonds than carbohydrates, plus they provide thermal insulation and protect delicate organs like your kidneys. Phospholipids form biological membranes and create the myelin sheath around nerve cells for electrical insulation.

Did You Know? Triglycerides produce metabolic water when oxidised - this is water your body creates during chemical reactions, which is particularly important for desert animals!

We thought you’d never ask...

What is the Knowunity AI companion?

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Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

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Most popular content in Biology

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App Store

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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