Explain giving reasons :
(a) Balanced diet is necessary for maintaining healthy body.
(b) Health of an organism depends upon the surrounding environmental conditions.
(c) Our surrounding area should be free of stagnant water.
(d) Social harmony and good economic conditions are necessary for good health.
(a) Food is necessary for the growth and development of the body. Balanced diet provides raw materials and energy in appropriate amount needed for the substances like protein, carbohydrates, fats, mineral etc. which in turn are essential for the proper growth and functioning of the healthy body.
(b) Health is a state of being well enough to function well physically, mentally and socially and these conditions depend upon the surrounding environmental conditions, e.g., if there is unhygienic conditions in surrounding area, it is likely we might get infected or diseased.
(c) This is so because many water-borne diseases and insect vectors flourish in stagnant water which cause diseases in human beings.
(d) Human beings live in societies and different localities like villages or cities, which determine the social and physical environment and hence both are to be kept in harmony. Public cleanliness is important for individual health. For better living conditions lot of money is required. We need good food for healthy body and for this we have to earn more. For the treatment of diseases also, one has to be in good economic condition.
(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) Which bacterium causes peptic ulcers ?
(ii) Who discovered the above pathogen for the first time ?
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
What precautions can you take in your school to reduce the incidence of infectious diseases ?
Name the target organs for the following diseases :
(a) Hepatitis targets…………
(b) Fits or unconsciousness targets…………
(c) Pneumonia targets…………
(d) Fungal disease targets…………
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.
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]
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]
Classify infectious agents into different categories and also mention the diseases caused by them.
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
Why do some children fall ill more frequently than others living in the same locality ?
Differentiate between communicable and non-communicable diseases. Give one example of each.