Biology

Why Do We Fall Ill?

Question:

Name the vectors which can cause rabies.

Answer:

Most of the animals included humans can be infected and all of them can spread the disease. Dogs, rats, cats, monkeys, squirrels, cattle, wolves, racoons, bears etc. can spread this disease. In India, mostly it spreads through dog bites and monkey bites.
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Why Do We Fall Ill?

Q 1.

Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.

Q 2.

What is inflammation ? Write the symptoms of this in human body.

Q 3.

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

Q 4.

Give two examples of bacterial antibiotics.

Q 5.

Name the vector that can cause sleeping sickness.

Q 6.

Name the pathogen causes peptic ulcer.

Q 7.

Majority of children in many parts of India are already immune to Hepatitis A by the time they are five years old. Why ?

Q 8.

What is a balanced diet?

Q 9.

What is 'germ theory of disease'? Who proposed it?

Q 10.

Give examples of fungal diseases.

Q 11.

Give an example of fungal antibiotic.

Q 12.

Why Colostrum is good for infants?

Q 13.

What do signs and symptoms indicate if a person is suffering from any disease ? [SAII -2014]

Q 14.

What is an antibiotic ? Give its one example.

Q 15.

(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 16.

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 17.

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

Q 18.

(i) How do you define 'disease'? (ii) State and explain in brief the four major factors, which are the causes of disease.

Q 19.

How do antibiotics (say Penicillin) work on bacteria but not on human beings?

Q 20.

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

Q 21.

What is immunisation?

Q 22.

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

Q 23.

Differentiate between acute diseases and chronic diseases.

Q 24.

What do you mean by active and passive immunisation ? [SAll – 2015]

Q 25.

Classify infectious agents into different categories and also mention the diseases caused by them.

Q 26.

Why is immune system essential for our health ?

Q 27.

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 28.

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 29.

Name the microbe which causes acne.

Q 30.

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

Q 31.

Name the vector which causes malaria.

Q 32.

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

Q 33.

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 34.

Write differences between 'Being Healthy' and 'Disease Free'.

Q 35.

Many vaccines form the public health programme of childhood immunisation for preventing infectious disease. Name any two such diseases.

Q 36.

State any two conditions essential for being free of disease.

Q 37.

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 38.

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 39.

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

Q 40.

Why does intake of penicillin not affect human cells ? [SAll – 2014]

Q 41.

List the diseases caused by viruses?

Q 42.

Name the protozoan pathogen that causes kala-azar.

Q 43.

Name the diseases that can spread through housefly.

Q 44.

Name the vectors which can cause rabies.

Q 45.

(a) What are epidemic and endemic diseases? (b) Which organ is affected if a person is suffering from jaundice?

Q 46.

What do you mean by Phagocytosis?

Q 47.

Write three differences between Personal Health and Community Health.

Q 48.

Differentiate between allergy and autoimmune diseases.

Q 49.

Name two diseases caused by Protozoans. What are their causal organisms ?

Q 50.

What is an antibiotic ? Give two examples.