FUNCTIONS OF VARIOUS CLASSES OF FOOD

Food Classification, Sources and Functions

CLASS	SOURCES	FUNCTIONS
Carbohydrates	Cassava, yam, maize, sugar-cane, honey, potatoes, rice, millet etc.	Provide energy needed for the body.
Proteins	Fish, meat, milk, beans	Body building, repair and replace worn-out tissues.
Fats and Oil	Animal oil, palm oil, butter, groundnut oil, cheese, fish oil, cod liver oil, coconut oil	Regulate body temperature, secondary source of energy.
Mineral Salts	Milk, meat, liver, cheese, vegetables, sea foods	Proper functioning of the body.
Vitamins	Liver, eggs, milk, fish oil, citrus, tomatoes, fruits.	Protection against diseases.
Water	Rain, Springs, brooks, vegetables, fruits, Beverages tea etc.	For easy digestion and maintenance of body fluid.

CARBOHYDRATES

Glucose is the end product of the digestion of glucose. Excess glucose is converted as glycogen and stored in the muscles and liver. Carbohydrates are initially used as the major energy source. Carbohydrates are made up of carbon, hydrogen and oxygen.

FATS AND OIL

Fats are the second most readily available source of energy during exercise. But it requires a much more complicated process of releasing their energy to meet the demands of exercise. The chemical composition of is carbon, hydrogen and oxygen.

PROTEIN

This is the third most available energy source used by the body. The end product of protein is amino acid. The composition of protein is carbon, hydrogen, oxygen, nitrogen, phosphorus.

EVALUATION QUESTION

List the classes of food.
Mention sources of food of each of the classes.
State the functions of each of the classes.

WEEKEND ASSIGNMENT

Food serves the following purpose except ______A. eliminate hunger B. provide energy C.enhance growth D. increase hunger.

The class of food that helps in the growth of new cells is called ______ A. fat and oil B. mineral salt C. protein D. vitamins
Which of the following class of food can be regarded as the best source of energy for exercise? A. protein B. fat and oil C. vitamins D. fat and oil
Which of the following is not a function of food to the body? A. Development B. Retardation C. Energy D. Growth
The class of food that provides resistance to diseases is _______ A. fats and oil B. proteins
vitamins D. water