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

Scientific principals Assignment 1

Extracts from this document...


Scientific principals - Assignment one This table shows the nutritional requirement of the body. For people involved in a high amount of sport the requirement level could be slightly higher. Requirements recommended (per day) Nutrient Woman Man Protein 54g 63g Fat 75g 95g Carbohydrate 50 - 55% 50 - 55% Fibre 20 - 35g 20 - 35g Vitamins Small amounts needed. If a balanced diet is eaten no problems will come from needing more of these. Small amounts needed. If a balanced diet is eaten no problems will come from needing more of these. Minerals Small amounts needed. If a balanced diet is eaten no problems will come from needing more of these. Small amounts needed. If a balanced diet is eaten no problems will come from needing more of these. Water Around 2 litres Around 2 litres This table shows the structure and the function of carbohydrates, proteins, lipids and water. Nutrients Structure Function Carbohydrates Are compounds made from one or more basic building blocks, all related to glucose Provides energy to keep the body working properly. Proteins Compound of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur or phosphorous. ...read more.


Complex carbohydrates are long chains of glucose molecules wich must be broken down in to glucose befor they can be used in the body. These provide a long, slow relese of energy. This type of carbohydrate is good for endurance athletes for example long distance runners because it allows them to go at a steady speed for a longer period of time due to the long and slow release of energy. The other type of carbohydrate is simple. Simple carbohydrates (or sugars) are a single ring consisting of between 3 and 7 carbon atoms because of this they can be broken down easliy and used for energy almost straight away. This however is a quick, short burst of energy. Befor athelets take part in a competition or match they should eat a meal containing complex carbohidrates about 3 hours befor. This allows the long chain of glucose to be broken down and used as energy during the sport. This type of energy is better than simple carbohydrates befor phisical activity because it doesn't give the quick burst of energy and the low after it. The structure of protein is more complex than that of a carbohydrate, they contain carbon hydrogen and oxygen the same as a carbohydrate, however these also contain nitrogen, some proteins can also contain sulphur and phosphorous. ...read more.


When taking part in a sport such as weightlifting where muscles need to be tested and pushed to there maximum ability with out damaging. Lipids contain more energy than carbohydrates, similarly to carbohydrates they are made of carbon hydrogen and oxygen. They are large compounds and are generally insoluble in water. There are many different types of lipids, Phospholipids (an example being lecithin) are one type; this is a component of the cell membrane and found in the blood. Fat is another type of lipid, these are a source of energy and help to insulate the body, a fat molecule is made up of fatty acid and glycerol. Lipids provide more energy than carbohydrates for the same weight. This means that for endurance sports lipids are more effective for energy, this allows the athlete to perform at a high level increasing the duration and at a higher intensity. Water effects exercise because it keeps performers hydrated and there functions working correctly. In every sport staying hydrated is extremely important for performance. In order for any athlete to perform to there best ability water is needed. During exercise a great deal of water is lost threw sweat. Staying hydrated allows any performer to exercise at a high intensity for a longer duration. ...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)

    Lightweight rowers aim to keep body fat levels low to maintain a good power-to-weight ratio. Common Nutrition Issues Training Nutrition Rowers have very high energy and carbohydrate requirements to support training loads and meet body weight and strength goals. All rowers need to work hard to recover between training sessions.

  2. the effect of bile concentration on the activity of the enzyme lipase during the ...

    of lipase and that being bile salt concentration and not temperature as well as it will be kept constant If the milk is heated to a high temperature it turns creamy and goes rancid 8 This has a very little impact on our data as we would know when the

  1. Nutrition Assignment

    * Calcium: required for healthy teeth, bones and muscles. Lack of calcium can cause bone weakness. * Sodium: all cells need this, especially nerve cells. If you have too much salt it can cause the following symptoms include: nausea, vomiting, diarrhoea and abdominal cramps.

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

    * The inside layer of an artery is very smooth because it's allowing the blood to flow quickly. * The outside layer of an artery is very strong because it's allowing the blood to flow forcefully. * The oxygen-rich blood enters the capillaries where the oxygen and nutrients are released.

  1. Investigating the effects of different lead chloride concentrations on the growth of cress seedlings

    by electron carriers. During this process energy is released which synthesises ATP from ADP + Pi. The electrons are again excited to a higher energy level by the light energy absorbed by photosystem I and combine with hydrogen ions and the carrier molecule NADP to give reduced NADP.

  2. Energy for Home Assignment.

    The liquid forms a closed loop that efficiently transfers the sun's energy to the water we use for bathing, washing dishes, and even swimming. The third method for capturing solar energy is with solar cells, also known as photovoltaic. Solar cells are devices that convert the sun's energy directly into electricity.

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