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

Scientific Principles - All living organisms require a range of foods to supply their needs.

Extracts from this document...


Scientific Principles Assignment 1 All living organisms require a range of foods to supply their needs. Humans have special needs in terms of macro-components in their diet. The committee on medical aspects of food policy (COMA) produced a report in 1991 called Dietary reference values of food energy and nutrients for the UK, which updated dietary requirements Dietary Requirements Our energy and nutrient requirements vary according to our age, sex, body size and levels of activity. Since everyone is different, it is very difficult to be specific about individual energy and nutrient requirements. Scientists have estimated the requirements for groups of people with similar characteristics such as age, sex and levels of physical activity. I recorded my diet over a period of three days on a diet collection sheet. (appendix 1) I found the foods I had consumed fitted into the following categories. Proteins Protein helps build muscles, protect our immune system and keep our body in top working order. ...read more.


In fact, as a supplier of concentrated energy and "essential fatty acids," it is a valuable and necessary part of a healthy diet. It is eating too much of the wrong kinds of fat that can cause health problems, and in this article I explain the differences between "good" and "bad" fats. Why Some Fat is Good for You * Fat is where our body stores excess calories. When your body's stores of carbohydrates have been depleted, which can occur after as little as 20 minutes of aerobic activity, it draws on necessary reserves of fat for energy. * Fat helps maintain healthy hair and skin. * Fat transports the important fat-soluble vitamins, A, D, E and K through the blood stream. * Linoleic acid, one of the most essential fatty acids, helps ensure proper growth and development for infants. All Fats Are Not Created Equal The fats we eat, as opposed to the ones that exist in our body and blood stream, are divided into three categories, according to the level of their hydrogen saturation. ...read more.


Remember that all fats, regardless of type, contain the same number of calories. So in conclusion, margarine is better for you because it does not increase cholesterol like butter. The observations from my dietary sheet show that I have consumed numerous carbohydrates and forms of lipids such as fats and oils. Carbohydrates are one of the main forms of 'quick' energy. Examples of these would be glucose, sucrose and starch all of which are mainly sugars. Complex Carbohydrates are made up of two or more simple sugars linked together. Disaccharides are compounds that contain a bond between carbon (1) of one sugar and a hydroxyl group at any position on the other sugar. The phospholipid bilayer where the cell membrane is an example of is composed of various cholesterol, phospholipids, glycolipids and proteins. Below is an example of a simple phospholipid bilayer. The smaller molecules between the phospholids are cholesterol which help to give rigidity or stability to the membrane. The phospholipids are the hydrophilic circles with hydrophobic tails. And since most of the cell and area surrounding the cell is made up of water, these fatty acid tails always 'push' away from the water. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Food Technology 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 GCSE Food Technology essays

  1. Explain the need for nutrition by living organisms.

    IDENTIFY AND EXPLAIN FULLY THE MAIN STAGES OF DIGESTION AND JUSTIFY THE NEED FOR EACH PROCESS. DIGESTION is the breakdown of food into simpler molecules that can be absorbed and used by the body. It begins with the mouth through the pharynx, oesophagus, stomach, small intestine, large intestine, rectum and then anus.

  2. To find out whether the foods contain starch, fats, proteins and glucose or not.

    X Stay at the same color (blue). * Changed the color from light blue to orange. X stay at the same. Milk X Stay at the same color (brown). * Changed the color from blue to violet. * Changed the color from light blue to yellow. * White emulsion. Oil X Stay at the same color (brown).

  1. Free essay

    An Investigation into Convenience Foods

    * Frozen meals are perceived to be of lower quality and less healthy than chilled meals. * Frozen meals are commonly served to children. Breakdown in types of frozen ready meals sold: * International 50% * Traditional 28% * Fish-based 12% * Healthy recipe 10% Complete ready meals dominate the frozen ready meals sector (80%)


    fat and 38.1 g of protein Foods from KFC have very less calories just as much as 614 calories much lesser than the other two fast foods.318 fat cals and 31 cals of protein, By the observation of the data we find that calories don't exceed the days limit then

  1. Health Report.

    Slowly return to the starting position. Alternate legs. Vary by raising leg with knee bent. V sit-ups: You can do this one in bed. Raise both legs and your upper body simultaneously-keeping your legs straight with arms out straight for balance.

  2. Nutrients and a Healthy Diet Dietary Intake

    If you training hard and possibly doing multiple daily sessions, the recovery meal is critical. Have 1grm of carbohydrate per kg of body weight and about 30 grams of protein. Have a drink (eg a recovery drink or a pint of skimmed milk)

  1. Chocolate: Behind its bad rap

    that advising people to eat chocolate regularly is a reckless message that should be ignored. A more accurate message would be, according to the British Heart Foundation, to "enjoy a little chocolate in moderation, but ensure you eat five portions of fruit and vegetables daily to get all the flavonoids you need without the added fat."

  2. Investigate the range of cookie style biscuits available in a local supermarket

    Equipment list Electric mixer Large Bowl Small bowl Tablespoon Teaspoon Wooden Spoon Fork Sift Metal Plate Two Baking Trays Wooden triangle Cooling Wire Time Plan Tesco Cookies value pack * 90p for x 2 300g packs * Suitable for vegetarians * flavours - choc chip Nutrition for each cookie (11g)

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