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Why Do We Fall Ill

Class 9th Science Bihar Board Solution

In Text Questions-pg-178
Question 1.

State any two conditions essential for good health.


Answer:

Two conditions essential for good health are

(i) Availability of better sanitation or clean surroundings


(ii) Availability of sufficient and nutritious food.



Question 2.

State any two conditions essential for being free of disease.


Answer:

(i) Living in hygienic environment.

(ii) Getting vaccinated against common infectious diseases as required.



Question 3.

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


Answer:

Answers of to the above questions are different because a person may be free of disease but his mental, social or economic health may not be good



In Text Questions-pg-180
Question 1.

In which of the following cases 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?


Answer:


Jaundice: refers to pale the skin which occurs when there is too much bile pigment in the blood. It is first noticed in whites of the eyes due to high bilirubin level. High unconjugated bile pigment may due to liver diseases such as blockage of bile duct which supply bile juice to break down food.
Lice:
Head lice are wingless insects spending their entire lives on the human scalp. They led to head itching .
Acne:
is an inflammatory skin condition that causes spots and pimples, especially on the face, shoulders, back and upper arms. Whiteheads, blackheads, pimples, and nodules are all types of acne involves oil glands grow when the follicles get blocked, and oil builds up under the skin.
In the case of Jaundice, the effects will be more long-term and unpleasant. In case of Jaundice, the liver is affected caused by a virus, and it takes proper treatment supervision of a doctor to recover from it whereas compared to that lice and acne can both be removed from short-term treatment and don't have any long-term effects on our body.


Question 2.

List any three reasons why do 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?


Answer:

The following three symptoms indicate our disease and urge us to go to see doctor.

1. Severe headache, shivering and Fever


2. Vomiting


3. Muscular Pain


If only one of the above three symptoms were present, we still would have to consult doctor. Its because all the three symptoms made us uncomfortable and bed-ridden for sometimes and can be symptoms of some disease.



In Text Questions-pg-187
Question 1.

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


Answer:

When we fall sick, one or more organ-systems do not function normally. As a result, we lose appetite and do not have proper digestion ability and absorption of food is slow. Sickness makes us weak and it takes long time to recover. Therefore, we are advised to take bland and nourishing food during sickness. Such a food is easily digested and replenish our lost vitamins, minerals and other nutrients along with energy.



Question 2.

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


Answer:

Infectious diseases are generally spread through air, through water, through sexual contact, through vectors (e.g. mosquito), through physical contact with affected person, through articles or fomite borne (bedding, utensils, clothes, etc.) of use of affected person. The disease can have many ways to enter a human body.



Question 3.

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


Answer:

Following precautions can be taken in the school to reduce the incidence of infectious diseases:

(i) providing clean drinking water.


(ii) educating students about causes of infectious diseases such as cholera, hepatitis, flu, AIDS, etc.


(iii) vaccination of students against common infectious diseases from time to time.


(iv) proper sanitation or clean environment in school and its surroundings to eradicate vectors (e.g. mosquito) of infectious diseases, and


(v) by not allowing the affected students (e.g. a student suffering from viral disease, called measles or chickenpox) to attend the classes till they recover from infectious diseases.


(vi) by allowing rest and nutrition to the infected person.



Question 4.

What is immunisation?


Answer:

The process of boosting up our immune system by the help of vaccine which help the body to fight with infectious diseases is called as immunisation or vaccination .




Question 5.

What are the immunization programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?


Answer:

At the nearest public health centre in our locality, following childhood immunisation programmes are available :

(i) Prevention of polio;


(ii) Prevention of tetanus, diphtheria and whooping cough;


(ii) Prevention of tuberculosis;


(iv) Prevention of measles.


Occasionally, children suffer from measles in our area.