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

Biological Chemicals

Extracts from this document...

Introduction

DONCASTER COLLAGE DEPARTMENT OF WELLBEING BTEC NATIONAL AWARD/DIPLOMA IN SPORT AND EXERCISE SCIENCE Scientific Principles - Assignment 1: Biological Chemicals Student: Robert Foster Date: 06/10/06 Tutor: Claire Rotherham Biological Chemicals In this assignment I am going to explain the structure and function of various nutrients and their use in the human body. Proper nutrition is a key component for good heath and physical fitness. For best possible body function you must eat the right combination of nutrients they include: Water (H2O) The body is 70% water, although these values vary between 60% and 70%. It provides an environment for all biochemical reactions in the body such as dissolves substances, transportation of nutrients and the lubrication of joints. During exercise water maintains water balance and controls body temperature. Failure to replace water can lead to dehydration which can cause serious problems such as heat exhaustion. The structure of water is below: Carbohydrates Carbohydrates exist mainly in the form of sugars and starches and are used as a major energy source. ...read more.

Middle

A carbohydrate deficient diet affects both high intensity anaerobic and long aerobic exercise. Proteins Proteins are made of amino acids in a linear chain. They make up the major structural component of cells, antibodies (immunity system), enzymes and hormones. They are necessary for the body to build, repair and maintain muscle and other tissues. Protein is mainly required after exercise. Protein may be needed in order to promote muscle adaptation during recovery from exercise in a couple of ways: * Aiding in the repair of exercise-induced damage to muscle fibres * Promoting training-induced adaptations in muscle fibres * Facilitating the replenishment of depleted energy stores. Peptide bond A peptide bond is a chemical bond formed between two molecules when the carboxyl bond of one molecule reacts with the amino group of the other releasing a molecule of water. This is a dehydration synthesis reaction (also known as a condensation reaction), and usually occurs between amino acids. ...read more.

Conclusion

and are relatively insoluble in water. Some lipids are used for energy storage, others serve as structural components of cellular membranes, and some are important hormones. Here are some lipid functions: * Energy storage, lipids are effective at storing energy. They contain more energy than, for example, carbohydrates, because of their high carbon to oxygen ratio (less oxygen than in carbohydrates). * Cell membrane structure Lipids in cell membrane structure (phospholipids) constitutes a barrier for the cell, controls membrane fluidity and controls the flow of material in and out of the cell * Lipid hormones like steroids and eicosanoids - mediate communication between cells. (reference of picture www.chemistryexplained.com/Kr-Ma/Lipids.html) Assembly of lipids into more complex structures At low concentrations lipids form monolayers, with the polar head group (represented as a circle) associating with the water, while the hydrophobic tails (represented as lines) associate with the air. As the concentration of lipid increases, either miscelles or bilayers form, depending upon the lipid and conditions. ?? ?? ?? ?? Btec National Award Sport & Science Robert Foster 1 Scientific Principles Assignment 1 ...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 Anatomy & Physiology 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 Anatomy & Physiology essays

  1. Free essay

    sports nutrition

    at their sport to the best of their ability due to lack of energy and without the right amount of protein their muscles would stay the same size and could even get smaller. Many athletes often take protein shakes as they find it hard to fit all the protein into

  2. Skeletal System and Joints

    Its anterior surface is convex. The vastus intermedialis muscle is attached to the base of patella. The vastus lateralis and vastus medialis are attached to lateral and medial borders of patella. The patella's leverage advantages can help for example footballers to kick a ball a lot harder.

  1. A level Project, Personal Exercise Program on Netball.

    My performer does this by standing side on to the opposite teams' player and makes sure they stay the alleged one meter away so as not to cause obstruction upon the player. This use of marking allows the player to intercept with a greater use of the positioning of the ball in relation to the marked player.

  2. Describe the components of a balanced diet.

    Fibre also removes some saturated fats and cholesterol therefore protecting the body a little from the build up of plaques in blood vessels. Fruit, vegetables and cereals are a good source of dietary fibre. Water The diet must provide water which is required as a solvent.

  1. Personal Exercise Program

    For example during a game a player may become unbalanced whilst undertaking a tackle and would need to have a good balance to recover and be successful with the tackle. Flexibility is essential within hockey, as players need to be able to achieve an extended range of motion at a joint.

  2. Biomechanics Assignment 2

    that a randomly chosen point on the function will be less than or equal to m, and the probability is at least 1/2 that a randomly chosen point on the function will be greater than or equal to m.

  1. Movement within the Body and the Cardiovascular System

    No special equipment is needed to exercise isometric, for example pushing against a wall. But the muscle only gains strength in the angle that you perform the training, for example if holding out a weight at either side using the deltoids to keep them up at a 45o angle from

  2. Identify and justify the key components of fitness.

    Reaction time - This is the time taken to react to a stimulus once detected with the first movement made in response to that stimulus. Reaction time is affected by nerve impulses and the speed of muscle contraction. The reaction time depends also on how long it takes to process the information being received.

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