NUTRITION ICSE CLASS 9

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NUTRITION ICSE CLASS 9

DOWNLOAD MOBILE APPLICATION TO LEARN MORE: NUTRITION ICSE CLASS 9

Q1. Define malnutrition

Ans. Malnutrition is the condition in which a person suffers due to lack or deficiency of one or more essential elements of food.

Q2. Categories the following items into carbohydrates and proteins:

1. Cellulose……                     
2. Starch……
3. Egg albumen…….            
4. Milk……
5. Pea…….                              
6. Glycogen………..
7. Cane-sugar….

Ans. Carbohydrates Proteins

(i) Cellulose        III. Egg albumen

(ii) Starch             IV. Milk

(vi) Glycogen      V. Pea

(vii) Cane-sugar.

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Q3.  Which one of the following pairs of nutrients includes both as simple sugars (monosaccharides)?

(a) Sucrose and glucose                 (b) Glucose and maltose

 (c) Fructose and glucose              (d) Maltose and lactose

 Ans. (c) Fructose and glucose

Q4. Which one of the following is the correct matching of a nutrient mineral element and its one rich source?

(a) Calcium – Potato         (b) Sodium- Citruis fruits

(c) Iodine – Dairy milk     (d) Potassium- Banana

Ans. (d) Potassium Banana       

 Q5. Name the mineral element that is needed for the following respectively:

(i) Strong teeth                 (ii) Proper working of thyroid

(iii) Synthesis of hemoglobin

Ans. (1) Calcium and phosphorus, (ii) iodine, (iii) Iron

Q6. Give two examples each of the following and their usefulness, if any, in our body.

1. Monosaccharides.
2. Disaccharides.
3. Polysaccharides.

Ans. (i) Monosaccharides simple sugar i.e. glucose found in organism and fructose in plant and galactose in the milk is known as monosaccharide’s (C₆H₁₂O₆). These are soluble in cold water.

(ii) Disaccharides double sugar which requires digestion e.g. sucrose, maltose and lactose. Its chemical formula is C₁₂H₂₂O₁₁.

(iii) Polysaccharides an insoluble carbohydrate stored in plants like potatoes, maize and barley etc. It is also known as a starch. Its chemical formula is C₆H₁₀O₅.

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Q7. Define and give one example of a balanced diet.

Ans. A balanced diet is one which contains all the principal constituents of food in proper quantity.

A balanced diet is the sufficient number of calories which it will provide. A calorie is the amount of heat required to raise the temperature of one gram of water by one degree Celsius.

Category of people                                         Requirement of Kcal/day

An adult labourer                                             3500

A clerk                                                                  1800-2500

A child (about 6 years)                                   1100

An adult lying at rest                                       1600

A woman at complete rest                           1450

Q8. A doctor advises a bone patient to include more of milk and milk products in his everyday food. Why so?

Ans. Bones are generally made up calcium and iron and milk and milk products are rich in calcium. Milk is very good source of calcium and vitamin A. Calcium is needed for making the bones strong. In children it is very useful for the bones and for the teeth. After menopause in the ladies the bones become very weak and brittle so they need milk to complete the deficiency of calcium. Milk also prevents oxidation of vitamin A Milk is very useful for the young and the old persons. The fibrins which makes the clothing of blood as a result of injury on the body. Calcium is helpful for the clotting of blood.

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 Q9. List the six main purposes for which food is required by the body.

Ans.  All living organisms require food. It is needed for six main purposes.

• Growth: Building up new protoplasm or cells for growth.
•  Repair: Providing material for the repair of worn-out or injured cells.
• Energy: Providing energy needed by the body to carry out various life functions.
• Maintenance of chemical composition of cells.
• Raw materials for the manufacture of various secretions such as enzymes, hormones, sweat, milk etc.
• Protection from disease and infection.

Q10. What is meant by nutrition?

Ans. NUTRITION: “Complex process of ingesting, digesting. Absorbing and assimilating the food is called NUTRITION”.

Q11. State the role of nutrients in our body.

Ans. Role of nutrients in our body:

• They help regulate the body processes.
• They serve as fuel to provide energy.
• They provide materials for building, repairing or maintaining body tissues.

Q 12. State the mode of transmission of the following diseases:

• AIDS:
• Mumps :
• Poliomyelitis :
• Rabies:
• Jaundice:
• Common cold :
• Cholera :
• Tuberculosis:
• Diphtheria :
• Syphilis:

Ans.

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• AIDS: Virus: By Sexual contact, blood transfusion. Spreads the virus known as HIV.
• Mumps: Virus: Person to person contact.
• Poliomyelitis: Virus: Spread by secretions of nose, throat, and excreta. Incubates in the intestine and reaches the brain through blood stream.
•  Rabies: Virus: A canine disease. Transmitted to humans by the bite of mad dog (Saliva contains virus).
•  Jaundice: Virus: Exposed unhygienic food and fluids.
• Common cold: Virus Through moisture droplets released by infected during sneezing and coughing. Contact with personal articles soiled by nasal discharge.
• Cholera: Bacteria: Caused by bacteria vibrio comma, transmitted through food water which are contaminated by dust and flies.
• Tuberculosis: Bacteria: Mycobacterium tuberculosis rod shaped bacteria spread by air, dust, and sputum of infected per son.
•  Diphtheria: Bacteria: Discharge from the throat of in fected person by sneezing, coughing.
• Syphilis: Bacteria: Sexual contact with infected person

Q13. State the main characteristics of the following fungal dis – cases:

(i) Athlete’s foot:

(ii) Ringworm:

 (iii) Thrush:

Ans. 

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• This is a common infection between the toes. The in fected skin becomes white and peels off to reveal a red raw area. Infected skin causes itching, blisters and cracking.
• Ring-shaped lesions appear on the skin, especially of the scalp and nails. The affected area becomes discoloured and is covered by scales and vesicles.
• White patches appear on the throat, tongue, lips and palate in young children. Causes vaginal infestation in women.

Q14. (a) How is amoebic dysentery caused?

(b) Name the vector through which the disease spreads.

(c) Mention three measures that can be taken to control the breeding of the named vector.

Ans.

• Entamoeba hystolytica resides in large intestinal wall and destroys the wall.
•  Contaminated food and flies are the vectors.
•  i.e.
• In villages, garbage should be spread in fields so that it dries up quickly to prevent egg-laying.
• Lime should be added to manure to prevent egg laying.
• Garbage and refuse should be kept in closed dust bins and then should be buried or treated with insecticides.

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ALSO VISIT :

9TH ICSE

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GRAVITATION	Movement and locomotion	QUIZ 2 ON CIRCLES	QUIZ ON ATOMS AND MOLECULES	Quiz on work, power and energy
MENSURATION	Digestive system	QUIZ 3 ON CIRCLES	Quiz on Periodic classification of elements	Quiz on Distance formula
Archimedes Principle		Quiz on Quadrilaterals	Quiz on Periodic table	Quiz on polynomials

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