Food and Digestion introduction
Blanced Diet - The correct amount of all the nutrients and having the necessary energy requirements
Carbohydrate - Found in Bread, potato and cereal (sugar and starch are also carbs) - Needed for energy
Protein - Found in meat, fish and eggs - Needed for Growth and Repair
Fat - Found in for Cream, butter, milk and oil - Needed for a store of energy
Vitamins - Found in Vegetables and cereal - Needed to keep things 'ticking over' (Vit D means Healthy bones - Vit A means good eyesight)
Minerals - Found in Meat, milk and cereal - Needed for strong bones (Calcium keeps bones strong - Iron keeps blood good)
Fibre - Found in Fruit, Veg and cereal - Needed to keep you regular
Water - Found in Water and most foods - Needed for hydration
- Drop some iodine onto the food. If the iodine turns blue/black then starch is present
Simple Sugars (e.g. Glucose)
- Boil the food in Benedict's solution. If an orange precipitate appears then the food contains simple sugars
- Add 10 drops of Biuret solution to the food in a test tube. If protein is present$, it will produce a purple product
- Crush up food, add a few drops of water and stir
- Take the solution and add it to a DCPIP Solution
- Keep adding until the DCPIP is decolourised.
Food Tests Continued
- Shake or crush the food to make it dissolve.
- Filter or dilute the food and ethanol mix so that you get a clear liquid (a solution of fat in ethanol).
- Add this to a test tube of water. A white (milk-like) emulsion indicates the presence of fats or oils.
Metabolic Rate - The speed at which such chemical reactions take place in the body.
It varies because of several factors, including:
- Gender - male or female
- The proportion of muscle to fat in the body
- The amount of exercise and other physical activity
- Genetic traits
The metabolic rate increases as we exercise and stays high for a while afterwards.
Teeth - Diet 1
Herbivore - Animals that only eat plants
Carnivore -Animals that only eat flesh (meateaters)
Insectivore- Animals that only eat insects
Teeth - Diet 2
Omnivore - Animals that eat flesh and plants
Teeth - Definitions
Cutting teeth used for pieces of food
These are long and sharp teeth used to tear and hold food
These are used to crush and grind soft food
Used for chewing and grinding hard food
Teeth Milk Adult
Incisors 8 8
Canines 4 4
Premolars 4 8
Molars 4 12
TOTAL 20 32