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.
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
Many vaccines form the public health programme of childhood immunisation for preventing infectious disease. Name any two such diseases.
Majority of children in many parts of India are already immune to Hepatitis A by the time they are five years old. Why ?
(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]
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 ?
Who discovered ‘vaccine’ for the first time ? Name two diseases which can be prevented by using vaccines.
Classify infectious agents into different categories and also mention the diseases caused by them.
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]
What precautions can you take in your school to reduce the incidence of infectious diseases ?
“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 ?
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.
Becoming exposed to or infected with an infectious microbe (toes not necessarily mean developing noticeable disease. Explain.
Why do some children fall ill more frequently than others living in the same locality ?
State giving reasons whether the following statements are correct or not: