• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Measuring Calories and Structure and Role of Macronutrients

Extracts from this document...

Introduction

´╗┐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.

Middle

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.

Conclusion

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.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Home Economics - Why is nutrition important to sports people?

    5 star(s)

    Detailed research Energy The preliminary research showed that possibly the most important factor of sports/rowing nutrition is energy. The more detailed research shall cover the different types and classifications of energy, its uses and how it can be achieved effectively.

  2. Field trip report Mangrove ecosystem

    High salinity: The high salinity of seawater make plants has to face the osmotic problem. In the estuarine area as well as rainy days, the soil pH of about 8.4 will vary for about 2-3 pH. Hence organisms have to tolerate the fluctuation of salinity.

  1. Heart Disease

    Causes of Angina The main cause of angina is the narrowing of the coronary arteries. In a normal person, the inner walls of the coronary arteries are smooth and elastic, allowing them to constrict and expand. This flexibility permits varying amounts of oxygenated blood, appropriate to the demand at the time, to flow through the coronary arteries.

  2. Fats & Oils Investigation. Fats and oils naturally occur in food, and play ...

    For the human body to digest this, bile, which is secreted by the liver and stored in the gall bladder, is a catalyst which helps to break down the fat. This process is similar to the way detergent dissolves greases and oils; it dissolves the masses of fat into tiny droplets.

  1. Should everyone be to taking statins to reduce the risk of cardiovascular disease

    This then forms a plaque which hardens the outer edge of the atheroma. Because of the increased blood pressure around the site of atheroscleorisis, the fibrous cap on the atheroma can rupture ripping the endothelium in the process. As a result platelets in the blood gather at the site of the tear, forming a blood clot or a thrombosis.

  2. Malnutrition occurs when the body does not get enough vitamins, minerals, and other nutrients ...

    Someone can be malnourished for a long or short period of time, and the condition may be mild or severe. People who are malnourished are more likely to get sick and, in severe cases, might even die.

  1. Why the Body Needs Energy? Every living cell within the ...

    Reference: (Tucker Louise anatomy and physiology 1988) http://www.blobs.org/science/cells/bvartery.gif http://resources.schoolscience.co.uk/abpi/heart/heart2.html Website viewed on 28 / 4 / 08 Capillaries A capillary are the smallest blood vessel that you find at the end of the bloods rout to the organs this is allowing the gasses (oxygen and carbon dioxide)

  2. Malaria Issue Report

    Mefloquine Lariam tablets 1. Weekly dose 2. Effective for most areas of the world 3. Can be used in the last 2 trimesters of pregnancy 1. Needs to be commenced 2 to 3 weeks prior to departure 2. May cause neuro-psychiatric adverse events Doxycycline Capsule 1.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work