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In this blog post, we will talk about the topic of nutrient in I/GCSE Biology. Let's get started! 🥰
Changing lifestyles
- Serious health problems due to poor diet and lack of exercise
- Too much sugar, lack of fruit and vegetable
You are what you eat
In I/GCSE Biology, you have to remember the following terms
- Carbohydrates and fats provide energy (alive/active)
- Proteins, vitamins and minerals – grow and replace damaged cells and tissues
- Varied diet ➡️ good
- Malnutrition ➡️ wrong amount of nutrient eaten
- Deficiency disease ➡️ not enough of a certain vitamin or mineral
- Keep balanced/healthy diet
Metabolism
It's commonly asked in I/GCSE Biology!!
More exercise ➡️ more energy needed
- Chemical reactions in body release energy from food
Metabolic rate ➡️ speed at which your body uses that energy
- Energy needed for breathing, digestion, keep heart beating (when resting)
- Resting/Basal Metabolic rate ➡️ rate when resting
- Higher metabolic rate ➡️ more energy you use
- Exercise increases metabolic rate
- Exercise increases proportion of muscle to fat in body
- Metabolic rate also affected by inheritance, lifestyle
- Metabolic rate decreases with age
Blood cholesterol levels
It's also crucial that you have to remember what cholesterol is inI /GCSE Biology!
- Cholesterol ➡️ a fatty substance transported by blood
- Cholesterol ➡️ keeps boy cells functioning normally
- Blood cholesterol levels depends on amount of fat in diet (also inheritance)
- High blood cholesterol levels ➡️ increased risk of diseases from heart and blood vessels
And we're done with this topic! Well Done!
Drafted by Alyssa (Biology)
References:
- "poor diet and lack of exercise". Photo from the internet.
- "balanced diet". Photo from the internet.
- "Is my “slow metabolism” stalling my weight loss?", https://a99d9b858c7df59c454c-96c6baa7fa2a34c80f17051de799bc8e.ssl.cf1.rackcdn.com/images/metabolism1.jpg
- "High cholesterol", https://www.heartfoundation.org.nz/images/heart-healthcare/public/other/cholesterol-graphic.png?width=623&height=381