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]
Every microorganism shows its effect on any particular tissue or organ after entering into the body. Thus, there is a change in the structure and function of that tissue or organ. For example, if the lungs are the targets, the symptoms will be cough and breathlessness. If the liver is the target, there will be jaundice. This is called Organ specific manifestation.
Give any four factors necessary for a healthy person.
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
(c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chickenpox. Why ?
“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 ?
Give four modes of transmission of AIDS.
What is a disease ? How many types of diseases have you studied ? Give examples.
What do you mean by disease symptoms ? Explain giving two examples.
State giving reasons whether the following statements are correct or not:
What is an antibiotic ? Give two examples.
Who discovered ‘vaccine’ for the first time ? Name two diseases which can be prevented by using vaccines.
Why is immune system essential for our health ?
Common cold spreads faster and is difficult to control. Give reason. [SAII -2014]
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
(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.
Why are antibiotics not effective for viral disease ?
List any four essential factors that must be taken icare of by an individual for keeping good health.
(i) What is an epidemic disease ?
(ii) Which organ is affected if a person is suffering from jaundice ?
State any two conditions essential for good health. [SAII-2014]
State two principles of treatment of a disease.
Give the modes of transmission of each of the following diseases :
(i) Syphilis (ii) Tuberculosis (iii) Jaundice (iv) Japanese encephalitis [SAII -2012]
What do you mean by immune response ? , [SAII – 2014]
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.
What is the purpose of vaccination ?
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 ?
Name two diseases caused by Protozoans. What are their causal organisms ?