Class IX Science
NCERT Solution for Why Do We Fall ILL?
IN-TEXT QUESTIONS SOLVED
TEXTBOOK PAGE 178
Q.1. State any two condio essential for go d health.
Ans. Two conditions essential for good health are:
(i) State of physical, mental and social well-being.
(ii) Better surroundings or environment.
Q.2. State any two conditions essential for being free of disease.
Ans. The two conditions essential for being free of disease are:
(1) Personal ar d domestic hygiene.
(2) Clean environment and surroundings.
Q.3. Are the answers to the above questions necessarily the same or different? Why?
Ans. The answer to the above questions are different because a person may be free of disease but his mental, social or economical health may not be good.
Q.1. List any three reasons why you would think that you are sick and ought to to doge a doctor. If only one of these symptoms were present, would you still go to the doctor?
Why or why not?
Ans. The 3 reasons why one would think that he is sick are�(1) headache, (2) cold and cough, (3) loose-motions.
This indicates that there may be a disease but does not indicate what the disease is. So one would still visit the doctor for the treatment and to know the cause of above symptom.
Even in case of single symptom one needs to go to the doctor to get proper treatment.
Q.2. In which of the fawir case do you think the lor-terra effects on your health are likely to e most unpleasant?
• If you get jaundice
• If you get lice
• If you get acne.
Ans. In the above cases, lice and acne are acute problems of our health which can be cured in short duration. But jaundice is the disease that can have most unpleasant effect on our health as it affects the most important organ of our body i.e., liver. This disease is a chronic one.
Q.1. Why are normally advised to take bland and nouhfng f d when we are sick?
Ans. We are advised to tale bland nd nourishing food when we are sick because our body needs energy to release cells to overcome the infection, the wear and tear of body organ. The nourishing food provides nutrients to our body that will lur-ther provide energy and make new cells. No spices in the food m l es its digestion process faster, does not release acids in the body that can interfere in the treatment and cure.
Q.2. What are the different mean by which infectious diseases are spread?
Ans. The different means by which infectious diseases spread are:
(a) Through air: They are also called air-borne diseases. The air carries bacteria, virus and the diseases that can be caused are: common cold, influenza, tuberculosis etc.
(b) Through food and water: When one eats drinks contaminated food/water, that contains bacteria, vrirns, worm etc. it can cause diseases like cholera 'phoid, hepatitis,
(c) Trough contact: Many diseases spread by contact of infected person with the healthy person,
Example, fungal infections, skin diseases, scabies etc.
(d) By sexual contact: Many diseases can be transmitted, example, syphilis, AIDS.
(e) By body fluids: Fluids like blood, semen, mother's milk, when infected, can also cause diseases.
Example, AIDS.
(f) Vectors: The organism that spreads a disease by carrying pathogens from one place to another is called vector. Example, mosquitoes are vectors that carry pathogens like protozoa.
Q.3. Who precaution can you take in your school to reduce the incidence of infectious diseases?
Ans. The precautions that one cars tat e in school to reduce the incidence of infectious diseases are
(a) By using handkerchief while coughing sneezing.
(b) Washing hands before eating tiffins.
(c) Staying at home if anyone suffers from infectious diseases.
(d) Getting vaccinated before the infection affects.
(e) Keeping the school surroundings clean, checking for stagnant water.
Q.4. What is immunisation?
Ans. When the body attains immunity against any disease, due to vaccination. This process is called immunisation.
Q.5. What are the immunisation programs available at the nearest health centre in your locality? Which of these diseases are the major health probie in your area?
Ans. The immunization programmes available at the nearest health care centres axe:
(1) Child immunization programme starts from 0 to 12 years.
(2) Polio eradication programme
(3) H1 N1 screening programme
In rrlajor areas tuberculosis cases are reported in a large number which is a major concern.
QUESTIONS FROM NCERT TEXTBOOK
Q.1. How many times did you fall tll in the last one year? What were the illnesses?
(a) Think of one change you could make in your habits in order to avoid any off most of the above illnesses.
(b) Think of one charge you would wish for in your surroundings in order to avoid any off most of the above illness.
Ans. The illness was 2-3 times, coon-cold, oceued in a year.
(a) One change I would make in my habits in order to avoid the above illness is that I would take proper diet rich in vitamin C and would avoid too cold food.
(b) The surroundings should be neat, and clean,
Q.2. A doctor/nurse/health worker r e coed to more people than others in the community. Find out how she/he avoids getting sick herself/himself?
Ans. A doctor/nurse/health worker when exposed to sick people they keep their nose and mouth covered, take care of hygiene, wash hands with soap before drinking water or eating food. They use mask, gloves, etc to avoid the direct contact with the person suffering from infectious diseases.
Q.3. Conduct a survey in your neightbourhood to find out what the three most comman diseases are Suggest three steps that could be taken by brin down the in cidence of these diseases.
Ans.
Q.4. A baby is not able to tell his/her caretakers that she/he is sick. What would help us to find out
(a) that the baby is sick?
(a) what is the sickness?
Ans. (a) The symptoms like body temperature, fever, cough, cold, loose-motions, non-stop crying improper or no food intake etc. would help up to find that the baby is sick.
(b) The symptoms could help us to find out the sickness of the body,
Q.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 taking care of someone suffering from chickenpox.
(c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox.
Why?
Ans. (c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox.
As the person is riot taking proper thet which is required for her proper health and healing of body. Her chances of getting chicken-pox also high as her body's has lowered.
Q.6. Under which of following conditions are you most likely to fall sick?
(a) When you are taking examinafions.
(b) When you have travelled by bus and train, two days.
(c) When your friend is suffering font measles.
Why?
Ans. (c) When your friend is suffering from measles, as it is an infectious disease.