OCR B1B: Diet

  • Created by: neleanor
  • Created on: 17-02-14 21:33

(http://www.hsc.csu.edu.au/senior_science/core/life_chem/9_2_5/DigestSys.gif)The Digestive System.

Balanced Diet: Diet that includes healthy, proportional amounts of food from each food group!

Digestion: The breaking of large, complex molecules into smaller molecules that the body can then use in respiration for energy!

The Main Food Groups are:

    • Carbohydrates (Break down into sugar and starch. Used for energy)
    • Fats (Used for insulation and for reserve energy stores)
    • Fibre (Keep the intestines healthy. Help you go to the toilet)
    • Minerals/Vitamins (Help the immune system, help muscle contractions)
    • Proteins (Help with the growth and repair of cells) (1st Class- Meat, fish, eggs. 2nd Class- Nuts, fruit, vegatables "Don't contain all the essential Amino Acids")

Chemical Digestion: Digestive enzymes!

Physical Digestion: Chewing, peristalsis!

Proteins---> Proteases --->Amino Acids (Cannot be stored ->Liver->Urea->Kidneys/Urine)

Carbohydrates---> Carbohydrases --->Glucose (Stored in liver as Glycogen)

Fats---> Lipases --->Fatty Acids + Glycerol (Stored under skin/around organs

Kwashiorkor: A form of malnutrition when there isn't enough protein in the person's diet!

Risk Factors:

    • Famine
    • Limited food supply
    • Low levels of education/ No understanding of a proper diet


    • Changes in skin pigment
    • Decreased muscle mass
    • Diarrhea
    • Failure to gain weight and grow
    • Fatigue
    • Change in colour of texture of hair
    • Increased/More severe infections (Damaged immune system)
    • Irritability
    • Protruding belly
    • Dermatitis (Rashes)
    • Shock (Late stage)
    • Edema (Swelling)


  • Arterial blood gas
  • BUN
  • Complete blood count
  • Creatinine clearence
  • Serum creatinine
  • Serum potassium
  • Total protein levels
  • Urinalysis

Variations in diet:



No comments have yet been made