Biology

Why Do We Fall Ill?

Question:

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

Answer:

Infectious Diseases Non-Infectious Diseases
1. Caused by external factors e.g. pathogens 1. Caused by internal factors e.g. genetic abnormality
2. Diseases can spread unhealthy person to healthy person.2. Diseases do not spread from infected to a healthy person.
3. Infection can spread and infect others via direct contact or medium (air, water, vectors etc.)3.Infection does not spread through direct contact nor by the medium. However, it may be hereditary i.e. from parents to offspring.
4. Examples: Malaria, Dengue etc.4. Examples: Goitre, High Blood pressure, Diabetes
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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.

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

Q 8.

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 9.

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

Q 10.

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

Q 11.

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 12.

Give three examples of bacterial diseases.

Q 13.

Give two examples of bacterial antibiotics.

Q 14.

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

Q 15.

Name the vector which causes malaria.

Q 16.

What is antigen?

Q 17.

What do you mean by Phagocytosis?

Q 18.

What is an antibiotic ? Give two examples.

Q 19.

Name any four diseases transmitted through vectors.

Q 20.

Give four modes of transmission of AIDS.

Q 21.

How can we prevent water borne and vector borne infections ?

Q 22.

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 23.

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

Q 24.

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 25.

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 26.

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

Q 27.

Give examples of Acute diseases.

Q 28.

Differentiate between Acute Diseases and Chronic Diseases.

Q 29.

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

Q 30.

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

Q 31.

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

Q 32.

List the diseases caused by worms?

Q 33.

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

Q 34.

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

Q 35.

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

Q 36.

What are antibodies?

Q 37.

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

Q 38.

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

Q 39.

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

Q 40.

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

Q 41.

State any two conditions essential for being free of disease.

Q 42.

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

Q 43.

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

Q 44.

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

Q 45.

Why making anti-viral medicines is harder than making anti-bacterial medicines ?

Q 46.

State giving reasons whether the following statements are correct or not:

  1.  Our surrounding area should be free from stagnant water.
  2. Staying clean is not necessary as long as you eat a balanced diet.
  3.  Social equality and harmony are necessary for good health.

Q 47.

State any two conditions essential for good health.

Q 48.

Is there any difference between 'being healthy' and 'disease free'?

Q 49.

How do we identify a disease?

Q 50.

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