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Measuring Calories and Structure and Role of Macronutrients

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´╗┐Kenya Ville Access to Nursing ? Human Biology Assignment 2 Include the write up class experiment on measuring the relationship between BMR and calorie intake using the standard scientific report writing format. Title ? Measuring Calories in Food Hypothesis ? I think the manufacturers calorie counts will be lower than the calories found in the experiment. Apparatus ? 1. Stand 1. Clamp 2. Bunsen Burner 3. Asbestos Mat 4. Aluminium Foil 5. Peanuts 6. Doritos 7. Measuring Jugs 8. Weighing Scales 9. Thermometer 10. Tin Can 11. Tongs Method ? 1. Measure 200ml of water and pour into empty can 1. Place Doritos on foil 2. Weigh Doritos being used 3. Record temperature of water 4. Set fire to Doritos 5. Place foil with Doritos under the tin can 6. Wait for flame to go out 7. Record temperature 8. Record new weight of Doritos 9. Repeat steps 1-9 with peanuts in the place of Doritos Risk Assessment ? 1. The Bunsen burner should always have a safety flame (orange) when it is not being used 1. The foil may be hot after the food has been burnt, using tongs can help prevent burns 2. ...read more.


To keep the human body functioning correctly it needs nourishment, through eating and drinking the body can get this. The most important nutrients the body requires are called macronutrients; they are called this because they are the big (macro) nutrients. There are three macronutrients that are vital for the body to survive and these are carbohydrates, fats and proteins. Carbohydrates can be obtained through consuming bread, cereals, honey or other sugars. These carbohydrates are the bodies main source of energy, once they are in the body they can be broken down in two ways, the simple sugars can be used straight away within the cells were as the more complex sugars need to be broken down by the enzymes in the gut to make them into the simpler sugars. Once these sugars are in the cells they can be used for internal respiration to help the cells and tissues to function. If not all the energy from the carbohydrates is required then the body can also store it as fat. Fats are used for two main purposes, the first being insulation. When the environment is too cold for the body to handle fats can help to insulate the heat and keep our bodies warm. ...read more.


Examples of how these can affect the human body would be calcium and vitamin D. Calcium can be mainly found in dairy products as well as leafy green vegetables. Calcium is what builds and maintains our bones. Without calcium in our bodies bone density would decrease and would be more likely to suffer from breaks. As well as consuming enough calcium the body also relies on a healthy level of vitamin D, this is mostly produced in the skin through the use of ultra violet rays from the sun. Vitamin D promotes calcium absorption within the body. This means that bones rely on a healthy balance between both calcium and vitamin D. If the body is deficient in either one of these two nutrients the whole skeletal system could be at risk of developing problems such as ricketts or osteoporosis. Ricketts is when the bones a softened due to the lack of calcium present in them, causing them to be prone to fractures or deformity. Osteoporosis is when the bones become less dense causing them to weaken, become brittle and break. The main problem with osteoporosis is that once the bones have broken, they are difficult to heal again as there is simply not enough calcium to maintain them again. ...read more.

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