Biology

Why Do We Fall Ill?

Question:

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

Answer:

(a) Viral fever, Flu
(b) Elephantiasis, Tuberculosis (TB)
(c) Smallpox, Chickenpox
(d) Diabetes, Goitre

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Why Do We Fall Ill?

Q 1.

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

Q 2.

Name the pathogen causes peptic ulcer.

Q 3.

Why do some children fall ill more frequently than others living in the same locality ?

Q 4.

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

Q 5.

(i) What are the various ways to prevent the diseases ?
(ii) What is immunisation ?

Q 6.

Name the vector that can cause sleeping sickness.

Q 7.

Name the protozoan pathogen that causes kala-azar.

Q 8.

What is antigen?

Q 9.

Write three differences between Personal Health and Community Health.

Q 10.

In which of the following case 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 ?

 

Q 11.

“On exposure with an infectious microbe does not necessarily mean developing noticeable disease”. Do you agree ? Explain with reason. If yes, how severe infections occur in our body ?

Q 12.

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

Q 13.

What are infectious agents? What are the different infectious agents?

Q 14.

Define antibiotic? Explain how it is able to control bacterial infections but not viral infections.

Q 15.

A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.

Q 16.

What is immunisation?

Q 17.

Differentiate between allergy and autoimmune diseases.

Q 18.

Name any two groups of microorganisms from which antibiotics could be extracted.

Q 19.

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

Q 20.

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

Q 21.

Give four modes of transmission of AIDS.

Q 22.

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 23.

(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 24.

(a) What is immunisation ?
(b) Define immunity and vaccination.
(c) Define vaccine. .
(d) What type of diseases can be prevented through vaccination ? [SAII -2013]

Q 25.

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

Q 26.

Becoming exposed to or infected with an infectious microbe (toes not necessarily mean developing noticeable disease. Explain.

Q 27.

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

Q 28.

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

Q 29.

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 30.

What is a balanced diet?

Q 31.

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

Q 32.

What are acquired diseases?

Q 33.

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

Q 34.

Give three examples of bacterial diseases.

Q 35.

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

Q 36.

Name the diseases that can spread through housefly.

Q 37.

What are antibodies?

Q 38.

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 39.

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

Q 40.

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

Q 41.

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

Q 42.

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

Q 43.

(i) Which bacterium causes peptic ulcers ?
(ii) Who discovered the above pathogen for the first time ?

Q 44.

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

Q 45.

Which amongst the two diseases : acute or chronic has adverse effect on the health of a person? Explain giving a suitable example.

Q 46.

How can we prevent water borne and vector borne infections ?

Q 47.

State any two conditions essential for being free of disease.

Q 48.

State two principles of treatment of a disease.

Q 49.

How many times did you fall ill 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/most of the above illnesses.
(b) Think of one change you would wish for in your surroundings in order  to avoid any/most of the above illnesses.

Q 50.

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