In I/GCSE Biology, this part will discuss diet and exercise, basic knowledge of metabolism and blood cholesterol levels.

• Serious health problems due to poor diet and lack of exercise
• Too much sugar, lack of fruit and vegetable

• 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

NOTE: In I/GCSE Biology, MR= Metabolic Rate

• 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 MR = more energy you use
• Exercise increases MR
• Exercise increases proportion of muscle to fat in body
• MR also affected by inheritance, lifestyle
• MR decreases with age

In I/GCSE Biology,

• BCL depends on amount of fat in diet (also inheritance)
• High BCL = increased risk of diseases from heart and blood vessels

That's all~~

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