• 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. Physiology Within Sport

    For the ATP to release energy chemical bonds need to be broken off between the phosphates to create the molecule Adenosine diphosphate (di meaning two) by the breakage of the phosphate energy is released which can be used to contract the muscles.

  2. Skeletal System and Joints

    prone to injury in sports for example its common for footballers to get a good kick in the shin the triangular form spread the stress making it more likely to bruise than fracture. The triangular form can also allow for deeper muscles it grow and increase in strength under the

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

    Although they play different positions, alike my performer, they have a weakness for dodging the defender to make themselves available for passes. Comparing this to my performer, they tend to have a slower reaction time when the ball is passed.

  2. Movement within the Body and the Cardiovascular System

    Adrenaline This stimulates the heart by rapidly contorting glycogen into glucose this is called glycogenolysis, And the slower break down of lipids also for energy. Receptors Receptors provide information to the cardiac control centre; this information can be used to regulate the heart rate and the stroke volume Propriocepter in

  1. Exercise health and lifestyle

    Lower risk of bacterial contamination Smoking Negative effects Smoking is one of the worst things you can do to your body, it actually kills around 14,000 people in the UK each year. These deaths occur through a range of diseases such as a variety of cancers, cardiovascular disease and an array of chronic lung diseases.

  2. Free essay

    sports nutrition

    Minerals Minerals help your body grow, develop, and stay healthy. The body uses minerals to perform many different functions from building strong bones to transmitting nerve impulses. Some minerals are even used to make hormones or maintain a normal heartbeat.

  1. Muscles and Joints.

    in the usage of equipment regarding safety also, which exercise sequence he was comfortable with, that could give us the right results for our aim while Damilola helped gather some research on health and safety with Chizoba helping her until her main job arose as camerawoman.

  2. Nutrition and Digestion

    70% of total energy, equivalent to 6g to 10g carbohydrate/kg body weight/day. This is about 5-15% greater than the level of carbohydrate recommended for the general population. Protein is another important component to a balanced diet, the two types of protein are complete and incomplete.

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