Biology

Why Do We Fall Ill?

Question:

Common cold spreads faster and is difficult to control. Give reason. [SAII -2014]

Answer:

Common cold is a communicable disease. It is an airborne disease i.e., the microbes spread through the air. Thus, common cold spreads faster and is difficult to control.

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Why Do We Fall Ill?

Q 1.

State any two conditions essential for being free of disease.

Q 2.

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

Q 3.

What is an antibiotic ? Give its one example.

Q 4.

Why is it important that we think of these categories of infectious agents?

Q 5.

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) what is the sickness ?

Q 6.

Name the target organs for the following diseases :
(a) Hepatitis targets…………
(b) Fits or unconsciousness targets…………
(c) Pneumonia targets…………
(d) Fungal disease targets…………

Q 7.

Classify the following diseases as infectious or non-infectious :
(a) AIDS                        (b) Tuberculosis
(c) Cholera                  (d) High blood pressure
(e) Heart disease       (f) Pneumonia
(g) Cancer

Q 8.

You have suffered from chickenpox, when you were in class three. Why will you not suffer from it again ? [SAII -2014]

Q 9.

Are the answers to the above questions (Q2 and Q5) and necessarily the same or different? Why?

Q 10.

Name the vector which causes malaria.

Q 11.

What is antigen?

Q 12.

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?

Q 13.

Give four modes of transmission of AIDS.

Q 14.

Why is AIDS considered to be a ‘Syndrome’ and not a disease ?

Q 15.

Who discovered ‘vaccine’ for the first time ? Name two diseases which can be prevented by using vaccines.

Q 16.

In which of the following case do you think the long-term effects on your health are likely to be most unpleasant? a. if you get jaundice, b. if you get lice, c. if you get acne. Why?

Q 17.

Give three examples of bacterial diseases.

Q 18.

List the diseases caused by worms?

Q 19.

Give two examples of bacterial antibiotics.

Q 20.

What is the alternate name of brain fever? Which vector is responsible for this disease?

Q 21.

What do you mean by Phagocytosis?

Q 22.

What is an antibiotic ? Give two examples.

Q 23.

Name any four diseases transmitted through vectors.

Q 24.

How can we prevent water borne and vector borne infections ?

Q 25.

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 ?

Q 26.

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 ?

Q 27.

Kidneys of a person do not filter urine properly. How does it affect physical, mental and social dimensions of that person?

Q 28.

What is the difference between symptoms and signs of a disease?

Q 29.

Give examples of Acute diseases.

Q 30.

Differentiate between Acute Diseases and Chronic Diseases.

Q 31.

What are congenital diseases? Give two examples of such disease.

Q 32.

Name a disease which was earlier considered to be chronic but now can be treated in short duration?

Q 33.

Write few common signs and symptoms of a disease if a brain is affected.

Q 34.

List any two differences between infectious and non-infectious diseases. Write any one example of each disease.

Q 35.

What is the scientific name of roundworm? Where do we find it commonly in the human body? Name the disease caused by it.

Q 36.

Explain why antibiotics are more effective in curing bacterial diseases than viral diseases.

Q 37.

Why taking an antibiotic is not effective in the common cold?

Q 38.

What are antibodies?

Q 39.

How do Skin, Hairs, Saliva form the first line of defence against diseases?

Q 40.

Why are kids and elderly people more vulnerable to cold/flu?

Q 41.

Why do people staying in air-conditioned homes/offices catch cold more often?

Q 42.

Name any two diseases which are caused due to unprotected sexual intercourse.

Q 43.

List any four essential factors that must be taken icare of by an individual for keeping good health.

Q 44.

State any two conditions essential for being free of disease.

Q 45.

(i) Why a person suffering from AIDS cannot fight even small infections ?
(ii) In a slum area, many people are suffering from malaria. Mention any two unhygienic conditions that must be prevailing in that locality.
(iii) Why female Anopheles mosquito feeds on human blood ? [SAII – 2014]

Q 46.

State two principles of treatment of a disease.

Q 47.

What is a disease ? How many types of diseases have you studied ? Give examples.

Q 48.

What do you mean by immune response ? , [SAII – 2014]

Q 49.

What precautions will you take to justify “prevention is better than cure” ?

Q 50.

AIDS is a fatal disease. Explain why. [SAII – 2014]