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GCSE Core Science Human Biology I know what is required for a balanced diet GCSE Core Science STARTER Human Biology Functions of Fats, Carbohydrates and Proteins •The human body needs different nutrients to carry out the vital functions of life. •A healthy diet contains seven different NUTRIENTS - Minerals - Proteins - Carbohydrates - Fats - Fibre - Water - Vitamins GCSE Core Science Objectives By the end of the lesson I: •Know what is required for a balanced diet •Can explain the term malnutrition •Can describe and calculate the metabolic rate •Can describe how different foods contribute differently to the daily intake of calories Human Biology I can explain the term malnutrition GCSE Core Science Malnutrition Human Biology •Malnutrition is when you eat the wrong amount of each type of nutrient (too much or too little). •A balanced diet is one that has the correct amount of nutrient. Cycle of malnutrition women http://www.livevideo.com/video/26555FDD351D427BB66026B086D1C6AD/c ycle-of-malnutrition.aspx Malnutrition http://www.youtube.com/watch?v=OLX7qb9rNj0 I can describe and calculate the metabolic rate GCSE Core Science What is BMI? Body Mass Index (BMI) measures the relative amounts of fat and muscle in the body. Human Biology BMI = body mass (kg) (height)2 (m) Gloria: 1.45 m and 66 kg BMI = 31 BMI Conclusion <20 underweight Zak: 20-25 normal 25-30 overweight >30 obese 1.85 m and 66 kg BMI = 19 What are their health risks? Obese people have an increased risk of arthritis, diabetes and heart disease. People who are underweight tend to have poor immune systems and often get ill. I can describe and calculate the metabolic rate GCSE Core Science Can you calculate BMI? Human Biology I can describe and calculate the metabolic rate GCSE Core Science Are you right for your height? Human Biology In 2002, 22% of boys and 28% of girls aged 2-15 in the UK were overweight or obese. Statistics show that obesity levels, among both young people and adults, are rising. Calculating a person’s BMI can be useful, but the formula can overestimate the proportion of body fat in people who are muscular. This is because muscle is denser than fat. This means it is helpful to use extra measures to help judge how healthy a person is, such as waist circumference. I can describe how different foods contribute differently to the daily intake of calories GCSE Core Science What is wrong with fast food? Human Biology Fast food and takeaways such as curries, burgers and pizzas are high in unhealthy nutrients such as saturated animal fats, sugar and salt. Fast food usually contains very little fibre, vitamins, minerals or unsaturated vegetable oils, which are important for a healthy diet. I can describe how different foods contribute differently to the daily intake of calories GCSE Core Science The Calorie Delusion Human Biology 1. Speed read the journal article ‘Calorie Delusion’, underline important words and sentences (10mins) 2. Swap your paper with your partner and write down the highlighted sections (5 mins) 3. Combine the two sets of written sentences into an ordered paragraph (5 mins) 4. 1 or 2 groups will present their combined paragraph to the rest of the class GCSE Core Science PLENARY Human Biology