What do you mean by immunity?
The ability of the body to be resistant towards injury, poison or harmful pathogens and their products is called immunity. It is part of the defence reaction in the body. There are two types of immunity:
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
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 ?
Differentiate between communicable and non-communicable diseases. Give one example of each.
Which amongst the two diseases : acute or chronic has adverse effect on the health of a person? Explain giving a suitable example.
Majority of children in many parts of India are already immune to Hepatitis A by the time they are five years old. Why ?
List any four essential factors that must be taken icare of by an individual for keeping good health.
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 ?
Becoming exposed to or infected with an infectious microbe (toes not necessarily mean developing noticeable disease. Explain.
(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]
Classify infectious agents into different categories and also mention the diseases caused by them.
(i) Which bacterium causes peptic ulcers ?
(ii) Who discovered the above pathogen for the first time ?
Why do some children fall ill more frequently than others living in the same locality ?
What do signs and symptoms indicate if a person is suffering from any disease ? [SAII -2014]
(i) What is an epidemic disease ?
(ii) Which organ is affected if a person is suffering from jaundice ?
Name the target organs for the following diseases :
(a) Hepatitis targets…………
(b) Fits or unconsciousness targets…………
(c) Pneumonia targets…………
(d) Fungal disease targets…………
Who discovered ‘vaccine’ for the first time ? Name two diseases which can be prevented by using vaccines.
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 ?