Question

9. State the four ways in which saliva is useful to us.
10. Foods are classified into three groups on the basis of the functions they perform in our body. Name
these three groups, and briefly state their functions. Also give two sources of each.
Do OICOT​

Answer 1

Answer 9.

1. 30% digestion in the mouth due to the presence of salivary amylase

2. buffering

3. contains lysozyme which is antimicrobial in nature

4. lubrication and helps in formation of bolus

Answer 10.

Energy giving food : carbohydrates, fats ; provides energy ex- rice, fish

Body building food : proteins ; helps in maintaining health, immune, fluids and structure ex- pulses, meat, milk

Regulatory and protective food : vitamins and minerals ; protects from diseases ex- Vegetables, fruits, milk, meat