Diet for Healthy Living NCERT Solutions | Health and Physical Education for Class 9 PDF Download

Answer the following Questions

Q.1. Define the terms nutrition and nutrients.

The term Nutrition is related to our food intake and dietary patterns and utilization of protein, carbohydrate, fat, vitamins and minerals to maintain our health.
Nutrients are the organic substances which are required for building and repairing, obtaining energy and for protection from diseases.

Q.2. List the various constituents of food and mention their function in the body.

• Proteins: Proteins are essential for growth and repair of muscle and other body tissues. 
• Carbohydrates: Carbohydrates are the main source of energy for our body.
• Fats: Fats and oils are concentrated sources of energy. Fats are substances that our body stores for future use.
• Vitamins: Vitamins are organic substances that we require in adequate quantities for good health.
• Minerals: Minerals are the nutrients that are very essential for proper growth and functioning of our body.

Q.3. Why is it important to recommend special diet for pregnant and lactating women and sportpersons.

A pregnant and a lactating mother requires additional energy over and above her normal requirements, inadequate intake of nutrients causes harm to the foetus & the child and also sportsperson always needs to consume more calories than a non sportsperson because they undergo physical training which involves regular strenuous exercises for a long period for developing physical fitness that is why it is important to recommend special diet for pregnant and lactating women and sportpersons.

Q.4. Why is water considered a necessary constituent of the diet?

Water is considered a necessary constituent of the diet because it acts as the medium for biochemical reactions by breaking down complex food molecules, water transport food, chemicals and gases throughout the body and it is also eliminate the wastes as urine and sweat.

Q.5. List the nutritional disorders and state one characteristic of each.

• Marasmus: Under-nutrition, specially protein deficiency causes this diseases in children. Children with this condition have lost lot of muscle mass and subcutaneous fat.
• Rickets: Rickets is the softening and weakening of bones in children because of the inadequate vitamin D.
• Beri beri: This diseases happens due to deficiency of vitamin B1.

Fill in the blanks

(i) Vitamin A is a …….soluble Vitamin.
(ii) Vitamin C is a …….soluble Vitamin.
(iii) …………… diet contains adequate proportions of carbohydrates, proteins, fats, minerals and vitamins.
(iv) Yogic diet consists of natural ….. items.
(v) BMI can be assessed by ………….

(i) Vitamin A is a fat soluble Vitamin.
(ii) Vitamin C is a water soluble Vitamin.
(iii) Balanced diet contains adequate proportions of carbohydrates, proteins, fats, minerals and vitamins.
(iv) Yogic diet consists of natural food items.
(v) BMI can be assessed by dividing the weight in kilograms by the square of the height in metres (kg/m²).

Tick (✓) mark either Yes or No

(i) Water is a nutrient which makes up almost 70 per cent body weight. (Yes/No)
(ii) One should consume 6 – 8 glasses of water every day. (Yes/No)
(iii) Over-nutrition leads to obesity. (Yes/No)
(iv) Wheat and vegetables are the source of vitamin E. (Yes/No)
(v) Milk and milk products are the source of calcium. (Yes/No)

(i) Yes
(ii) No
(iii) Yes
(iv) Yes
(v) Yes