Protein

Function 1 and 2 is growth and mao

  • Essential in diet as they contain only source of nitrogen which is essential of all living cells

  • Preforms vital structures functions protein- main components of cells in body it’s important of muscles connective tissue glands skin hair and bone

  • Cells in body increase during growth- childhood and adolescence replacement tissue occurs in all stages of life

  • Protein in tissue is constantly being broken and must be placed from amino acids in diet

Function 3 formation of enzymes

  • Necessary for formation of enzymes facilitating most of chemical reactions in the body this includes digestion of nutrients regulation of production in cells synthesis of all chemical substances in body

  • Enzymes like amylases liapases protease are all crucial for digestion

Homeostasis function four

  • Hormones-many consist of amino acids. These act as messengers carried in circulation e,g by reaction the metabolic rate of blood glucose levels (insulin)

  • Fluid balance proteins in the blood plasma exert as osmotic pressure that hold fluids within the circulation. This prevent excess pooling body fluids in tissue space

  • Antibodies- protein plays a key role in function of the immune system . Deficiency will result in defective immune system

  • Acid base balance proteins acts as a buffer in the circulatory system and helps to maintain a fairly constant Ph in the body fluids and blood

Function 5 a secondary source of energy

  • 1g protein provide 17Kj 4kcals of energy

  • Not all protein supplied is used for growth and repairs

  • Protein available for use depend on biological value of protein in the diet

  • Diet may supply more protein than is required for growth and maintenance

  • Any excess protein may be used for energy a secondary source of energy

Function six transporter

  • Many substances need to be carried around the body e.g digestive system

  • Haemoglobin has oxygen- binding properties which enable it to transport protein serving to carry oxygen in the body to the tissuesb

Other functions

  • Blood clotting proteins provide the netting on which blood clots are built

  • Major components of the hair and nails amps well as the structural framework of the bones