(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]
(i) AIDS is caused by HIV which damages the immune system of the person suffering from it. Thus, the person cannot fight even small infections.
(ii) (a) Stagnant water in the surroundings, (b) Accomulation of garbage.
(iii) Because Female Anopheles mosquitoes require large amount of proteins to lay their eggs
(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]
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
(i) Which bacterium causes peptic ulcers ?
(ii) Who discovered the above pathogen for the first time ?
Name the target organs for the following diseases :
(a) Hepatitis targets…………
(b) Fits or unconsciousness targets…………
(c) Pneumonia targets…………
(d) Fungal disease targets…………
What precautions can you take in your school to reduce the incidence of infectious diseases ?
State giving reasons whether the following statements are correct or not:
Which amongst the two diseases : acute or chronic has adverse effect on the health of a person? Explain giving a suitable example.
(i) What is an epidemic disease ?
(ii) Which organ is affected if a person is suffering from jaundice ?
Why are we normally advised, to take bland and nourishing food when we are sick ? [SAII – 2011, 2013]
The signs and symptoms of a disease will depend on the tissue or organ which the microbe targets Justify the statement with two examples. [SAll – 2014]
In which of the following case do you think the long-term effects on your health are likely to be most unpleasant ?
Under which of the following conditions is a person most likely to fall sick ?
(a) When she is recovering from malaria.
(b) When she has recovered from malaria and is taking care of someone suffering from
chickenpox.
(c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chickenpox. Why ?
Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.
Classify infectious agents into different categories and also mention the diseases caused by them.
Becoming exposed to or infected with an infectious microbe (toes not necessarily mean developing noticeable disease. Explain.
You have suffered from chickenpox, when you were in class three. Why will you not suffer from it again ? [SAII -2014]
Differentiate between communicable and non-communicable diseases. Give one example of each.