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प्रश्न
Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.
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उत्तर
Function
1. energy giving food
2. bodybuilding food
3. regulatory and protective foods
Nutrient
1. carbohydrates and fats
2. proteins
3. vitamins and minerals.
Food
1. cereals, fats, sugar
2. pulses, milk, meat chicken
3. fruits and vegetables
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संबंधित प्रश्न
What is the function of digestive enzymes?
Label the following figure of the digestive system.
A part of the human digestive system
If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.
Name the hormone that helps in regulating level of sugar in our blood. Name the gland that secrets it.
Define the following term:
Peristalsis
Fill in the blanks.
The ______ and ______ are used for crushing and grinding the food.
Find the odd one out. Give reasons for your choice.
Differentiate between.
Mechanical digestion and Chemical digestion
The question has four options. Choose the correct answer:
Parotid salivary glands occur
The contraction and expansion movement of the walls of the food pipe is called ____________.
