Free Ncert Solutions for 9th Class Science Why do we fall Ill? - Studyadda.com

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9th Science Why do we fall Ill?

1)

How many times did you fall ill in the last one year? What were the illnesses? (a) Think of one change you can make in your habits in order to avoid any/most of the above illnesses. (b) Think of one change you would like to have in your surroundings in order to avoid any/most of the above illnesses.
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2)

A doctor/nurse/health-worker is exposed to more sick people than others in community. Find rot how she/he avoids getting sick herself/himself.
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3)

Conduct a survey in your neighborhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.
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4)

A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out (a) that the baby is sick? (b) that is the sickness ?
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5)

Under which of the following conditions is a person most likely to fall sick ? (a) When she is recovering from malaria. (b) When she has recovered from malaria and is taking care of some one suffering chicken pox. (c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken pox. Why ?
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6)

Under which of the following conditions are you most likely to fall sick? (a) When you are having examinations. (b) When you have travelled by bus and train for two days. (c) When your friend is suffering from measles. Why ?
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7)

State any two conditions essential for good health.
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8)

State any two conditions essential for being free of disease.
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9)

Are the answers to the above questions necessarily the same or different? Why?
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10)

List any three reasons why you would think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor? Why or why not?
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11)
In which of the following case do you think the long-term effects on your health are likely to be most unpleasant?
- If you get jaundice,
- If you get lice,
- If you get acne.
Why?
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12)

Why are we normally advised to take bland and nourishing food when we are sick?
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13)

What are the different means by which infectious diseases are spread?
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14)

What precautions can you take in your school to reduce the incidence of infectious diseases?
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15)

What is immunisation?
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16)

What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?
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17) Which one of the following is not a viral disease? (a) Dengue (b) AIDS (c) Typhoid (d) Influenza
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18) Which one of the following is not a bacterial disease? (a) Cholera (b) Tuberculosis (c) Anthrax (d) Influenza
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19) Which one of the following disease is not transmitted by mosquito? (a) Brain fever (b) Malaria (c) Typhoid (d) Dengue
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20) Which one of the following disease is not caused by bacteria? (a) Typhoid (b) Anthrax (c) Tuberculosis (d) Malaria
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21) Which one of the following disease is caused by protozoans? (a) Malaria (b) Influenza (c) AIDS (d) Cholera
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22) Which of the following has long term effect on the health of an individual? (a) Common cold (b) Chickenpox (c) Chewing tobacco (d) Stress
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23) Which of the following can make you ill if you come in contact with an infected person? (a) High blood pressure (b) Genetic abnormalities (c) Sneezing (d) Blood cancer
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24) AIDS cannot be transmitted by (a) sexual contact (b) hugs (c) breast feeding (d) blood transfusion
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25) Making anti-viral drugs is more difficult than making anti-bacterial medicines because (a) viruses make use of host machinery (b) viruses are on the border line of living and non-living (c) viruses have very few biochemical mechanisms of their own (d) viruses have a protein coat
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26) Which one of the following causes kala-azar? (a) Ascaris (b) Trypanosoma (c) Leishmania (d) Bacteria
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27) If you live in a overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases? (a) Cancer (b) AIDS (c) Air borne diseases (d) Cholera
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28) Which disease is not transmitted by mosquitoes? (a) Dengue (b) Malaria (c) Brain fever or encephalitis (d) Pneumonia
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29) Which one of the following is not important for individual health? (a) Living in clean space (b) Good economic condition (c) Social equality and harmony (d) Living in a large and well furnished house
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30) Choose the wrong statement. (a) High school pressure is caused by excessive weight and lack of exercise. (b) Cancers can be caused by genetic abnormalities (c) Social ulcers are caused by eating acidic food (d) Acne in not caused by staphylococci
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31) We should not allow mosquitoes to breed in our surroundings because they (a) multiply very fast and cause pollution (b) are vectors for many diseases (c) bite and cause skin diseases (d) are not important insects
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32) You are aware of Polio Eradication Programme in your city. Children are vaccinated because (a) vaccination kills the polio causing microorganisms (b) prevents the entry of polio causing organism (c) it creates immunity in the body (d) All of the above
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33) Viruses, which cause Hepatitis, are not transmitted through (a) air (b) water (c) food (d) personal contact
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34) Vectors can be defined as (a) animals carry the infecting agents from sick person to another healthy person (b) microorganisms which cause many diseases (c) infected person (d) diseased plants
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35) Give two examples for each of the following. (a) Acute disease (b) Chronic diseases (c) Infectious diseases (d) Non-infectious diseases
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36) Name two diseases caused by protozoan?s. What are their causal organisms?
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37) Which bacterium causes peptic ulcers? Who discovered the above pathogen for the first time?
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38) What is an antibiotic? Give two examples.
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39) Fill in the blanks. (a) Pneumonia is an example of ......... disease. (b) Many skin diseases are caused by?......... (c) Antibiotics commonly block biochemical pathways important for the growth of............. (d) Living organisms carrying the infecting agents it?s from one person to another are called ??........
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40) Name the target organs for the following diseases (a) Hepatitis targets............. (b) Fits or unconsciousness targets............ (c) Pneumonia targets............ (d) Fungal disease targets?...............
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41) Who discovered 'vaccine' for the first time? Name two diseases which can be prevented by using vaccines.
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42) Fill in the blanks. (a) ......... disease continues for many days and causes......... on body. (b) ......... disease continue for a few days and causes no longer term effect on body. (c) ......... is defined as physical, mental and social well-being and comfort. (d) Common cold is ............. disease. (e) Many skin diseases are caused by?..........
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43) Classify the following diseases as infections or non-infectious. (a) AIDS (b) Tuberculosis (c) Cholera (d) High blood pressure (e) Heart disease (f) Pneumonia (g) Cancer
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44) Name any two groups of microorganisms from which antibiotics could be extracted.
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45) Name any three disease transmitted through vectors.
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46) Explain giving reasons (a) Balanced diet is necessary for maintaining healthy body. (b) Health of an organism depends upon the surrounding environmental conditions. (c) Our surrounding area should be free of stagnant water. (d) Social harmony and good economic conditions are necessary for good health.
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47) What is a disease? How many types of diseases have you studied? Give examples.
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48) What do you mean by disease symptoms? Explain giving two examples?
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49) Why is immune system essential for our health?
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50) What precautions will you take to justify "prevention is better than cure"?
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51) Why do some children fall ill more frequently than others living in the same locality?
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52) Why are antibiotics not effective for viral disease?
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53) Becoming exposed to or infected with an infectious microbe does not necessarily mean developing noticeable disease. Explain.
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54) Give any four factors necessary for a healthy person.
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55) Why is AIDS considered to be a 'Syndrome' and not a disease?
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